Toggle navigation
explore
parks
collections
reports and research literature
map
outreach
hosted mapping
how to participate
about
about opn
access OPN data via OAI
contact
navigating collections
using images
Search Results
Sort (Relevance)
Relevance
Title
Date
Items per page (20):
20
50
100
Page 1 of at least 320
About 6,500 Items
Jump to Page
View:
Refine Search
update
reset
Park
Blue Ridge Parkway
16
Clemson University Libraries
43
Everglades National Park
2
Great Smoky Mountains National Park
3779
Kings Mountain National Military Park
79
Mammoth Cave National Park
18
National Park Service
62
National Park Service Water Resources Division
14
North Carolina State Parks
3
South Carolina Department of Parks, Recreation and Tourism
239
USGS Patuxent Wildlife Research Center
1
University of Georgia Libraries
5
Vicksburg National Military Park
6
Winthrop University
8
Yellowstone National Park
2357
Collection
Black and white negatives of South Carolina State Parks, 1934-1967
15
Blue Ridge Parkway Engineering Plans
16
Civilian Conservation Corps in Mammoth Cave National Park
18
Color Slides of Everglades National Park
1
Color slides of South Carolina State Parks
224
Jim Shelton's Glass Plate Negatives
7
Kings Mountain Nitrate Negatives
8
Negatives of Great Smoky Mountains National Park
3673
Panoramas from Lester Moe's Fire Lookout Station Survey, 1935-1936
63
Photo Album of Vicksburg Grounds
6
Photographs of Everglades NP
1
Reports and Research Literature
110
Survey of Fauna
7
Survey of Flora
11
Survey of National Parks
53
Yellowstone Photo Albums
2357
Creator
Ables, Ernest
1
Alberts, E.
1
Alberts, Edwin
1
Alston, William F. (Ranger Naturalist)
34
Baldwin, S. G.
9
Baron, J.
1
Beeson, D.
1
Bender, V. R.
24
Berry, Walter
1
Boaze, Pam
4
Boucher, Jack (NPS)
37
Bragg, R. L.
1
Bratton, Susan
3
Bredow, Tom
3
Broome, Harvey B.
3
Bryant, Larry
1
Burkett, Claire P.
109
Burns, Dick
7
Burns, R. C.
8
CML
2
Cain, Stanley
1
Camp, W.H.
1
Campbell, Carlos C.
10
Canter, Stanley
73
Cardwell, R. Glenn
7
Carter, C.
3
Carter, Carmen
1
Choberka, Erica
1
Clabough, James C.
16
Cline, W. M.
16
Cooper, D.
1
Cornelius, Ron
3
Cox, Elbert 1906-1993
8
Crawford, Barron
1
DMG
3
Davis, Carl
9
DeSelm, H.R.
1
Del Condon, David
67
Dunn, Commodore (Cliff) Clifton
3
EODC
89
Earnst, John
41
Edwards, Harold O.
7
Edwards, R.
1
Ela, Tom F.
21
Essary, S. H. Prof.
2
Evans, Gregory
1
Exline, Edouard Evartt
153
Fay, Frederick A.
9
Field, Richard
1
Fitzpatrick, Larry J.
44
Foster
1
G. M. L.
1
G., E. L.
2
Gibert, Stephanie
9
Gilbert, V.C., Jr.
15
Ginsberg, Howard
1
Glenn Hatcher
1
Grant, George A.
16
Graves, James
3
Green, Lucien C.
1
Grossman, Charles S.
137
H. R.
1
Hall, Warner
1
Hammitt, William
1
Harned, W. Douglas
1
Harper, Norman Mr. and Mrs.
4
Henry, W. C.
7
Hermann, Binger
1
Herzog, D.
1
Hoffman, Harold
1
Holland, Robert P.
8
Horne, John H.
17
Huber, R.
3
Huff, Mark
1
Hunt, Charles
1
Huskey, Jim
8
Hutchison, Pat
1
Jaquish, R. E.
1
Jennison, Harry Milliken
201
Jonas, Anna
1
Kimpel, Ray
5
King, Willis
71
King, Willis, 1908-
99
Langdon, K.
1
Larry Fitzpatrick
5
Larson, Gary
3
Light, J. B.
18
Lix, Henry W.
91
Loftis, W. M. Jr.
12
Longwell, Charles
1
MacKenzie, George C.
1
Mackenzie, George
1
Mathews, Jr., Raymond
1
McDowell, W.E.
1
McKinney, Norbert
1
McMurry, Richard M.
1
Menning, Ed P.
5
Miller, B. J.
30
Miller, Pat
1
Miller, Roger R.
80
Moe, Lester Maynard, 1910-1990
63
Montony, R. H.
1
Morrell, John O.
1
Motts, Paul
1
National Park Service
25
Needham, John T.
11
Newcomb
1
Nicholas NS
1
Nichols, E. A.
7
Nichols, H.
1
Nixon, Merily
1
Norman Roy
3
O'Halloran, Terrance
4
O'Neil, W. E.
1
Ownby, T. Lee
1
Parker,C.R.,Pipes,D.W.
1
Pease, T. K.
5
Peine, John
1
Petersen, Ronald
2
Phillips, W. C.
1
Pipes, David
1
Plastas, Harold
1
Pledger
27
Pozel, R. D.
28
Pyle, Charlotte
1
Rabinowitz, Alan
2
Rametta, Francis
5
Ransome, F.L.
1
Renfro, James
1
Rinehart
4
Robinette, T. L.
1
Rock, Janet
1
Roth, A. G.
1
Rowe, Abbie
1
Ryan, Jim
3
Schiele, R. M.
7
Schultz, D. Glenn
1
Scott, Ted R.
17
Senne
8
Shafer, C. H.
1
Shafer, Jr., C.H.
1
Sharp, Aaron J. (Aaron John), 1904-
55
Shelton, James B.
14
Shelton, Jim
7
Shields, Randolph A.
3
Shultz, Glenn D
2
Silsbee, David
1
Silsbee, David: Larson, Gary
1
Smith, Joe
1
Sneddon, G. Lee
5
Sommer, Sebastion (NC Department of Conservation)
2
South Carolina Department of Parks, Recreation and Tourism
224
South Carolina. State Commission of Forestry
15
Spaulding SA
1
Stites, James A.
357
Stupka, Arthur
278
Sullivan, Maurice
2
Swope
8
Tate, Jane
1
Taylor
1
Teaster, Von
3
Trentham, Orlie
2
Turner, M. Randall
1
Vincent, Susan Hart
1
Watson, Craig
1
Wentworth, Paul M.
1
White, P.S.
4
White, Peter
3
White, R. G.
8
White, R. P.
149
White, R.P.
12
Whitson, P.D.
1
Whitson, Paul
1
Whittaker, Paul
2
Wiggins, Jim
1
Wightman, Robert
17
Wilburn, Hiram Coleman, 1880-1967
32
Wilhelm, R. A.
123
Wolfe, Harry
1
Zani, Dick
5
Zynjuk, L.D.
1
Date
From:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Until:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
topic
Abies lasiocarpa
3
Absaroka Range (Mont. and Wyo.)
18
Absaroka-Beartooth Wilderness (Mont. and Wyo.)
1
Acid deposition
1
Acid rain--Environmental aspects
1
Acting
1
Administration
2
Aerial photographs
1
Aerial views
29
Aerial views (Maps)
1
Aesculus
2
Agreement
3
Agricultural machinery
13
Agriculture
12
Air quality
1
Airdrop
1
Airplanes
3
Albright, Horace M. (Horace Marden), 1890-1987
39
Alder
2
Alfalfa
3
Algae
2
All terrain vehicle trails
13
Aluminum cans
4
Amelanchier
7
American Legion
3
American beaver
1
American bison
120
American ginseng
1
American holly
1
Ammunition
2
Amphitheaters
34
Andropogon
5
Angiosperms
1
Animal cages
7
Animal carcasses
61
Animal defenses
2
Animal droppings
1
Animal ecology
2
Animal feeding
85
Animal marking
11
Animal migration
13
Animal populations
1
Animal remains (Archaeology)
1
Animal tracks
9
Animal traps
50
Animals
8
Animals--Counting
4
Animals--Food
58
Animals--Habitations
5
Animals--Transportation
1
Anniversaries
47
Antelopes
8
Antennas (Electronics)
3
Antennas, Reflector
1
Antique and classic cars
21
Antiquities
5
Antlers
23
Apartment houses
13
Aphids
10
Apiaries
1
Appalachian Mountains
1260
Appalachian Trail
13
Appalachians (People)
12
Apples--Storage
1
Aquatic plants
1
Aquifoliaceae
2
Arboretums
1
Archaeology
1
Arches
21
Architects
2
Architectural photography
3
Architecture
8
Archivists
1
Area
3
Aristolochia
1
Aristolochiaceae
1
Arrest
1
Artillery, Field and mountain
6
Artists
1
Ash (Plants)
1
Aspen
34
Asphalt
4
Asphalt pavers
10
Asphalt rock
2
Asters
6
Atlanta Campaign, 1864
2
Audiences
1
Automobile graveyards
1
Automobile mechanics
1
Automobiles
316
Automobiles--Maintenance and repair
1
Automobiles--Skidding
1
Automobiles--Snow protection and removal
1
Autumn
2
Avalanches
2
Avalanches--Control
1
Award presentations
16
Awards
83
Axes
11
Azaleas
7
Back
3
Bakeries
1
Bald eagle
1
Balsam fir
1
Balsams
2
Baptist church buildings
1
Baptist churches
2
Baptists
2
Barbecues (Fireplaces)
7
Barbers
3
Bark
4
Bark beetles--Biological control
4
Bark--Diseases and pests
1
Barns
74
Barracks
6
Barracks and quarters
1
Barrow's goldeneye
1
Basalt
14
Basalt outcrops
4
Baseball
4
Baseball fields
1
Baselines (Maritime law)
2
Basements
1
Basins (Geology)
5
Baskets
2
Bathhouses
2
Bats
2
Battlefields
2
Bauer, Clyde Max, 1886-
4
Bays
6
Beans
1
Bear cubs
5
Bear hunting
6
Beards
1
Bears
19
Beartooth Highway (Mont. and Wyo.)
1
Beartooth Mountains (Mont. and Wyo.)
5
Beavers
7
Beavers--Behavior
6
Bechler River Ranger Station (Wyo.)
3
Beech
2
Beef
1
Bees
1
Beetles
1
Benches
19
Benches (Geomorphology)--Wyoming
1
Big Hole National Battlefield (Mont.)
1
Big game hunting
1
Bighorn Mountains (Wyo. and Mont.)
2
Bighorn lambs
1
Bighorn sheep
22
Binoculars
1
Bins
3
Biologists
6
Birch
7
Bird banding
1
Birds
32
Birds--Eggs
6
Birds--Infancy
1
Birds--Nests
16
Birth announcements
1
Biscuit Basin (Wyo.)
15
Bishops
1
Bison
9
Bitumen
1
Black Canyon of the Gunnison National Park (Colo.)
1
Black Sand Geyser Basin (Wyo.)
4
Black bear
4
Blacksmiths
2
Blasting
14
Blind
4
Blue Mountains (Or. and Wash.)
1
Blue Ridge Parkway (N.C. and Va.)
19
Blue grouse
1
Bluegrasses
1
Boardwalks
1
Boars
16
Boat ramps
1
Boat trailers
3
Boathouses
4
Boats
5
Boats and boating
30
Boats and boating--Inspection
1
Boats and boating--Maintenance and repair
1
Boats and boating--Painting
1
Bobcat
3
Bodies of water
6
Bones
3
Books
1
Botanical specimens
1
Botanists
2
Botrychium
1
Boucher, Jack
8
Boulders
20
Boundaries, State
1
Boundary stones
1
Bowling alleys
1
Boy Scouts
6
Boys
3
Breakfasts
2
Breccia
6
Bricks
1
Bridge approaches
11
Bridge construction
12
Bridges
166
Bridges--Abutments
7
Bridges--Design and construction
55
Bridges--Foundations and piers
3
Bridges--Maintenance and repair
13
Bridges--Snow and ice control
1
Brook trout
5
Brook trout fishing
1
Brown trout
1
Brush
6
Bryant, H. C. (Harold Child), 1886-1968
1
Budget analysts
1
Buffalo Bill Dam (Wyo.)
1
Buffalo meat
4
Building
58
Building construction
23
Building materials
10
Building sites
11
Building, Stone
3
Building, Wooden
5
Buildings
120
Buildings, structures, etc
1
Buildings--Repair and reconstruction
3
Bulldozers
16
Bulletin boards
7
Bullets
2
Bumpus, Hermon C. (Hermon Carey), 1862-1943
1
Burl
1
Burley tobacco
1
Burning of Land
5
Burning of land
2
Bus terminals
3
Buses
24
Butchers
2
Buttercups
1
Butterflies
1
Cabinet officers
6
Cabinet officers' spouses
2
Cabinet officers--United States
2
Cables
7
Cache La Poudre River National Water Heritage Area (Colo.)
1
Cades Cove (Tenn.)
46
Cafeterias
2
Cajon Pass (Calif.)
1
Cake
6
Calamagrostis
1
Calcite
4
California gull
1
California--History
1
Cameras
2
Camp sites, facilities, etc
148
Camp sites, facilities, etc.--Public use
3
Campers (Persons)
1
Campfires
2
Camping
28
Camping trailers
1
Camps
11
Canada goose
4
Canals
1
Canoes and canoeing
1
Cans
1
Canyons
154
Car washes
1
Caravans
1
Carlsbad Caverns (N.M.)
1
Carmen Mountains (Tex.)
1
Carnivora
1
Carolina hemlock
1
Carr, Jim
1
Carriages and carts
5
Cartography
3
Cascade Creek (Park County, Wyo.)
3
Cascade Lake (Park County, Wyo.)
2
Cash management
1
Castanea
1
Castle Geyser (Wyo.)
10
Caterpillar tractors
5
Catoctin Mountain Park (Md.)
8
Cattle
4
Cattle herding
2
Caves
31
Caves--Oregon
1
Cedar
3
Cemeteries
4
Chairs
5
Chapels
5
Chestnut
7
Chickens--Housing
1
Children
55
Chimneys
13
Chisos Mountains (Tex.)
3
Christmas
25
Christmas tree ornaments
1
Christmas trees
1
Chrysothamnus
2
Church
7
Church buildings
3
Churches
2
Cider
1
Cigarettes
1
Cities and towns
46
Civilian Conservation Corps (U.S.)
23
Clark's nutcracker
2
Claytonia
2
Clearing of land
10
Clerks
5
Cletrac tractors
2
Cliffs
91
Climbing knots
1
Clingmans Dome (N.C. and Tenn.)
58
Clog dance music
1
Clog dancing
1
Clouds
5
Coal mine waste
1
Coal mines and mining
1
Coarse woody debris
10
Coffee
8
Coffee shops
1
Cold storage
2
Committees
1
Common snipe
1
Communication
2
Compass
1
Compositae
2
Concrete
1
Concrete bridges
1
Concrete construction
5
Concrete mixers
4
Concrete walls--Design and construction
1
Concrete--Cracking
1
Concrete--Mixing
1
Concretions
1
Cones (Botany)
2
Conference rooms
1
Conglomerate
3
Congresses and conventions
10
Conifers
6
Conservation
1
Conservation and restoration
19
Conservationists
4
Construction
60
Construction and demolition debris
2
Construction equipment
21
Construction projects
70
Construction workers
2
Control
2
Control boards (Electrical engineering)
1
Conversation
1
Conveying machinery
5
Cooks
1
Coolidge, Calvin, 1872-1933
1
Coolidge, Grace Goodhue, 1879-1957
1
Copper
3
Copying
1
Cormorants
3
Corn
7
Corncribs
4
Cornices
1
Corrals
139
Costume
1
Cottages
6
Cottonseed cake
1
Cottonseed cake as feed
3
Cottonwood
2
Country life
1
Coves (Valleys)
2
Cowboys
1
Cows
3
Coyote
8
Cracking
7
Cranes, derricks, etc
1
Craters of the Moon National Monument (Idaho)
6
Crates
6
Crawler tractors
1
Crested wheatgrass
7
Cribwork
3
Cross-country ski trails
1
Crow Indian Reservation (Mont.)
1
Crow Indians
1
Crowders Mountain State Park (N.C.)
2
Crowds
1
Crows
1
Cruciferae
1
Crushing machinery
13
Cultural landscapes
1
Culverts
13
Curbs
2
Cutting
1
Cyperaceae
1
Daisies
2
Damages
9
Dams
49
Dams--Design and construction
2
Dance
1
Dead trees
4
Death
1
Debris
1
Decking materials
3
Dedications
2
Deer
46
Deer--Virus diseases
1
Dehorning
5
Del Condon, David
8
Dermacentor
1
Designs and plans
1
Desks
1
Devils Tower National Monument (Wyo.)
1
Diapensiaceae
5
Dikes (Geology)
1
Dining rooms
1
Dinner parties
10
Dinners and dining
4
Diorite
1
Dirt roads
148
Ditches
16
Division
3
Docks
13
Dogs
6
Dogsledding
1
Domestication
2
Door fittings
1
Doors
3
Dormitories
1
Douglas fir
15
Drainage
4
Drawing
2
Drift
2
Drift fences
2
Drilling platforms
1
Drinking fountains
2
Drinking vessels
1
Driveways
1
Dry stone walls
1
Ducks
2
Dude ranches
5
Dump trucks
3
Dust
3
Dwarf irises
1
Dwellings
61
Dwellings--Flood damage
1
Dwellings--Foundations
1
Dynamite
2
Eagle Scouts
4
Earlham College
2
Early yellowrocket
1
Earthmoving machinery
6
Earthquake damage
28
Easels
1
Eastern hemlock
3
Ecology
2
Ecology--Research
2
Editors
1
Education
2
Educational exhibits, Traveling
16
Effect of fires on
1
Effect of water quality on
1
Elders (Plants)
1
Electric fishing
2
Electric generators
4
Electric lines
2
Electric lines--Poles and towers
1
Electric machinery
1
Electric power production
3
Electric power-plants
4
Electric switchgear
1
Electric transformers
1
Electricians
1
Elk
212
Elkmont (Tenn.)
7
Embroidery
1
Embryos
1
Emergency management
2
Emergency medical services
2
Emergency vehicles
2
Employees
2
Employees' buildings and facilities
28
Engineered wood construction
5
Engineering & construction
17
Engineering and construction
46
Engineering drawings
12
Engines
2
Environmental education
9
Environmental law--California
2
Environmental sampling--Equipment and supplies
1
Environmentalists
2
Equipment
1
Equipment and supplies
1
Equus
1
Ericaceae
27
Erosion
26
Erythronium
2
Essays
10
Eucalyptus regnans
1
Eupatorium
2
Eupatorium urticaefolium
2
European elder
3
Evergreens
2
Everts, Mount (Wyo.)
43
Ewes
2
Excavating machinery
2
Excavation
19
Excelsior Geyser (Wyo.)
2
Exhibitions
6
Experiments
1
Explosives
11
Explosives--Transportation
1
Extinct plants
1
Fagaceae
6
Fall, Albert B. (Albert Bacon), 1861-1944
3
Families
3
Family
2
Family recreation
1
Farm buildings
2
Farm equipment
1
Farmhouses
42
Farms
13
Father and child
1
Faults (Geology)
3
Fawns
16
Federal Hall National Memorial (New York, N.Y.)
1
Feeds
1
Felidae
3
Fences
32
Fences--Design and construction
4
Feral swine
1
Ferns
3
Field experiments
50
Fieldwork
3
Fills (Earthwork)
9
Filmstrips
1
Fir
23
Fire
7
Fire departments--Equipment and supplies
5
Fire drills
1
Fire engines
10
Fire extinction
9
Fire extinction--Water-supply
1
Fire extinguishers
3
Fire fighters
3
Fire hose
2
Fire lookout stations
86
Fire lookouts
5
Fire pumps
3
Fire stations
1
Firearms
1
Firehole River (Wyo.)
35
Firemen
2
Fireplaces
22
Fires
3
First ladies
3
Fish communities
2
Fish culture
4
Fish hatcheries
9
Fish ponds
1
Fish populations
1
Fish stocking
2
Fish traps
1
Fisheries
3
Fishers
7
Fishery law and legislation
1
Fishes
10
Fishes--Eggs
1
Fishes--Study and teaching
1
Fishing
17
Fishing Bridge (Wyo.)
16
Fishing boats
3
Fishing rods
1
Flagpoles
2
Flags
16
Flags--United States
2
Flax
2
Flood damage
37
Floodlighting
1
Floodplains
1
Floods
21
Flooring, Concrete
1
Flooring, Tile
1
Flowering
1
Flowering dogwood
1
Flowers
4
Flumes
28
Fluorescent lighting
1
Fog
2
Fontana Lake (N.C.)
2
Fontinalis
1
Food
1
Food industry and trade
12
Food--Preservation
2
Footbridges
39
Footprints
1
Forage plants
2
Fords (Stream crossings)
1
Forest biodiversity--Effect of fires on
1
Forest fire fighters
17
Forest fire fighters--Training of
13
Forest fires
36
Forest fires--Prevention and control
12
Forest fires--United States--Prevention and control
1
Forest guides (Persons)
1
Forest insects--Control
9
Forest management
8
Forest plants
2
Forest products industry
6
Forest rangers
9
Forest reserves
40
Forests and forestry
362
Formations (Geology)
24
Fossils--Collection and preservation
3
Foundations
7
Fountain Paint Pot (Wyo.)
9
Fountains
2
Fourth of July
1
Foxes
3
Framing (Building)
1
Fraser Experimental Forest (Colo.)
1
Freemasonry
2
Freshwater biologists
1
Frogs
1
Frost
5
Fuelwood
2
Fungi
9
Galax
6
Gallatin National Forest (Mont.)
1
Gallatin Range (Mont.)
14
Gallatin River (Wyo. and Mont.)
3
Game farms
1
Game protection
49
Game reserves
2
Game wardens
4
Garage doors
1
Garages
12
Gardner River (Wyo. and Mont.)
34
Garrison, Lemuel A., 1903-1984
2
Gatehouses
14
Gates
11
Gateways
2
Geese
6
General stores
8
Geodes
1
Geographic information systems
2
Geological Survey (U.S.). Rocky Mountain Region
1
Geological surveys
1
Geology
4
Geomorphology
1
Geothermal resources
1
Geysers
171
Giant Geyser (Wyo.)
9
Gibbon Falls (Wyo.)
3
Gibbon River (Wyo.)
13
Gifts
5
Glacial lakes
1
Glacier National Park (Mont.)
7
Glaciers
10
Glen Canyon National Recreation Area (Utah and Ariz.)
1
Golden Gate (Wyo.)
56
Golden eagle
1
Goldenrods
1
Gorges
1
Government employees
6
Government vehicles
18
Governors
1
Governors--United States
1
Graders (Earthmoving machinery)
14
Grading (Earthwork)
10
Graffiti
28
Granaries
3
Grand Canyon of the Yellowstone (Wyo.)
23
Grand Geyser (Wyo.)
6
Grand Teton (Wyo.)
9
Grand Teton National Park (Wyo.)
30
Granite
6
Granite outcrops
1
Grapes
1
Grasses
68
Grasslands
14
Gravel
12
Gravel roads
1
Gray jay
3
Grayling
1
Grazing
11
Great Smoky Mountains (N.C. and Tenn.)
10
Great Smoky Mountains National Park (N.C. and Tenn.)
702
Great Smoky Mountains National Park Biosphere Reserve (N.C. and Tenn.)
1250
Greek letter societies
24
Grizzly bear
3
Grotto Geyser (Wyo.)
3
Grouse
2
Guadalupe Mountains (N.M. and Tex.)
1
Guesthouses
1
Gulls
16
Habenaria
1
Habitat conservation
2
Habitat surveys
1
Handbooks, manuals, etc.
3
Harding, Florence Kling, 1860-1924
2
Harding, Warren G. (Warren Gamaliel), 1865-1923
3
Hartzog, George B., Jr., 1920-2008
14
Hats
71
Hay
30
Hay as feed
1
Hay--Harvesting
5
Haying equipment
1
Haynes, Jack Ellis, 1884-1962
1
Hazard signs
7
Heart Lake Geyser Basin (Wyo.)
3
Heather
1
Hebgen Lake (Mont.)
3
Helicopters
16
Heller, Edmund, 1875-1939
1
Herders
1
Herding
1
Heritage tourism
13
Hickories
1
Hides and skins
8
Hikers
25
Hiking
5
Hills
4
Historians
1
Historic building conservation
43
Historic buildings
13
Historic buildings--Conservation and restoration
4
Historic preservation
12
Historical markers
3
History, Military
1
Hoisting machinery
2
Holes
1
Hollies
3
Honey
2
Honey locust
1
Honeydew
2
Hoodoos (Geomorphology)
21
Hornaday, William T. (William Temple), 1854-1937
1
Horns
4
Horse boarding facilities
1
Horse troughs
1
Horse-drawn vehicles
42
Horsemanship
2
Horses
205
Horses--Transportation
1
Horseshoes
1
Horticulture
2
Hospital buildings
3
Hospitals
2
Hot springs
52
Hotbeds
3
Hotel cleaning personnel
1
Hotel parking facilities
1
Hotelkeepers
1
Hotels
37
House construction
5
House painting
1
Housekeeping
1
Houses
2
Housing
10
Houstonia
3
Hovenweep National Monument (Utah and Colo.)
1
Hunters
10
Hunting guns
5
Hunting rifles
1
Hydraulic gates
1
Hydrological stations
2
Hydrology
3
Hydrophyllaceae
10
Hydrothermal vents
2
Ice
13
Ice caves
1
Ice crystals
4
Ice fog
1
Ice on rivers, lakes, etc
8
Ice skating
1
Icehouses
4
Illustrations
1
Impact
2
Incentive awards
9
Incinerators
2
Inclusions
1
Indian pipe (Plant)
1
Indians of North America
6
Indians--Kings and rulers
1
Industrial housing
3
Information services
8
Insect pests
7
Insect pests--Control
2
Insect traps
3
Insecticides
1
Installation
5
Installation of equipment
1
Instructional films
2
Insulation (Heat)
1
Iridaceae
1
Irises (Plants)
1
Iron and steel bridges
3
Irrigation
6
Irrigation canals & flumes
1
Irrigation canals and flumes
1
Irrigation water
2
Islands
25
Isle Royale National Park (Mich.)
1
Jackhammers
1
Jackrabbits
2
Jackson Hole (Wyo.)
4
Jackson Lake (Teton County, Wyo.)
19
Japanese
1
Jays
1
Jenny Lake (Wyo.)
2
Job shops
1
Journalists
6
Juglandaceae
1
Junipers
3
Junk
12
Jupiter Terrace (Wyo.)
21
Kalmia
1
Kennesaw Mountain National Battlefield Park (Ga.)
2
Killdeer
1
King's Mountain, Battle of, S.C., 1780
2
Kings Mountain National Military Park (S.C.)
3
Kitchens
1
Klamath Mountains (Calif. and Or.)
1
Knitting
1
Koeleria
1
Krascheninnikovia lanata
1
Ladders
2
Lagoons
2
Lakes
273
Lambs
8
Lamiaceae
1
Lampposts
2
Landforms
2
Landscape architects
4
Landscape architecture
2
Landscape gardening
2
Landscape photography
86
Landscapes
33
Landslides
224
Laundries
2
Laurel
1
Lava
3
Law enforcement
1
Lawns
3
LeConte, Mount (Tenn.)
41
Leather
1
Leaves
4
Lee's Ferry Historic District (Ariz.)
1
Legislators--United States
13
Legumes
1
Leigh, Richard, -1899
1
Leiophyllum
16
Leisure
3
Lepidoptera
1
Leucanthemum vulgare
1
Levees
1
Liberty Cap (Wyo.)
4
Librarians
2
Library materials
2
Lichens
1
Lightning-arresters
2
Liliaceae
1
Limber pine
5
Limestone
1
Lincoln automobile
1
Lindens
2
Liquor bottles
1
Liquor laws
1
Liriodendron tulipifera
10
Litter (Trash)
7
Litters
9
Little Bighorn Battlefield (Mont.)
2
Little Bighorn Battlefield National Monument (Mont.)
3
Liverworts
1
Livestock
2
Livestock--Equipment and supplies
1
Loaders (Machines)
2
Lobbies (Rooms)
1
Loch Vale Watershed (Colo.)
1
Locomotives
2
Lodgepole pine
14
Lodges
2
Lodging-houses
3
Log buildings
69
Log cabins
84
Logging
3
Logging railroads
2
Logs
2
Lone Star Geyser (Wyo.)
3
Louisiana Purchase
1
Lower Falls of the Yellowstone River (Wyo.)
9
Lower Geyser Basin (Wyo.)
13
Lumber sheds
1
Lumbering
4
Lyme disease
1
Machine design--Handbooks, manuals, etc
1
Machine parts
4
Machinery
5
Mack trucks
1
Madison Range (Mont.)
2
Madison River (Wyo. and Mont.)
6
Maintenance
6
Maintenance and repair
26
Mammals
5
Mammals--Ecology
1
Mammoth Hot Springs (Wyo.)
96
Management
1
Manholes
4
Manure
1
Maple
1
Maps
9
Marchantia
4
Marchantiaceae
2
Marshes
1
Mass-wasting
1
Mather, Stephen Tyng, 1867-1930
10
Meadows
248
Meal
1
Measuring instruments
2
Meat
1
Medals
2
Mediterranean-type ecosystems
1
Meldrum, John W., 1843-1936
2
Memorialization
2
Memorials
3
Men
24
Men--Services for
1
Metals
1
Meteorological services
4
Meteorological stations
4
Microscopes
2
Migration
1
Miles, A. W. (Arthur Wellington), 1859-1933
1
Milestones
2
Military parks
2
Millers
4
Mills and mill-work
43
Mimosa
2
Mints (Plants)
1
Mixing machinery
1
Mobile homes
1
Models
1
Molly Islands (Wyo.)
14
Molting
1
Monologue
1
Monotropa
1
Monuments
2
Moonlight
2
Moose
20
Moose calves
8
Morchellaceae
1
Morels
1
Mosses
1
Motion picture devices
2
Motion picture locations
1
Motion picture projectors
3
Motion pictures--Production and direction
6
Motorboats
5
Motorcycles
7
Mountain Bridge Wilderness (S.C.)
224
Mountain Passes
11
Mountain chickadee
2
Mountain fog
18
Mountain goat
4
Mountain hemlock
1
Mountain laurel
46
Mountain meadows
1
Mountain passes
184
Mountain passes--Wyoming
1
Mountain people
101
Mountain people--Southern States
4
Mountain pine beetle
4
Mountain plants
1
Mountain resorts
24
Mountain roads
116
Mountain sheep
35
Mountain shelters
7
Mountain whitefish
1
Mountaineering
17
Mountaineering guides (Persons)
4
Mountains
3275
Moving of buildings, bridges, etc
8
Mowing machines
3
Mud
9
Mudslides
4
Mulching
2
Mule deer
20
Mules
2
Museum buildings
1
Museum exhibits
1
Museum storage facilities
1
Museums
19
Mushrooms
1
Music
2
Muskrat
2
National Park Service popular study series. History
2
National cemeteries
2
National park concessions
2
National parks & reserves
4
National parks and reserves
48
National parks and reserves--Management
2
National parks and reserves--Planning
1
National parks and reserves--Public use
5
National parks and reserves--Transportation
1
Natural bridges
4
Natural history
2
Natural history handbook series
2
Natural resources
1
Natural resources--Management
3
Naturalists
27
Nature observation
4
Nature photography
1
Nature trails
51
Navajo Sandstone
1
Nests
1
Newsletters
2
Newspaper employees
1
Newspapers
1
Nez Perce Indians
1
Noatak National Preserve (Alaska)
1
Norris Geyser Basin (Wyo.)
50
Norway spruce
2
Nurseries (Horticulture)
24
Nurseries--Equipment and supplies
5
Nurses
1
Nye, Gerald P. (Gerald Prentice), 1892-1971
2
Nyssaceae
2
Oak
8
Obsidian
3
Obsidian Cliff (Wyo.)
7
Oconaluftee Indian Village (Cherokee, N.C.)
1
Off-road vehicle trails
1
Off-road vehicles
3
Office buildings
9
Office parties
30
Officers
3
Offices
4
Oil storage tanks
2
Oiled roads
49
Old Faithful Geyser (Wyo.)
56
Older men
10
Older people
1
Older women
8
Olympic National Park (Wash.)
1
Orchards
3
Orchestra
3
Orchids
1
Ore deposits
1
Oregon Caves National Monument (Or.)
1
Oregon National Historic Trail
1
Ores
1
Organic wastes
1
Orientation
1
Osmundaceae
2
Osprey
2
Otters
2
Outbuildings
12
Outcrops (Geology)
2
Outhouses
1
Overhead electric lines
2
Owls
1
Oxalis
1
Oxen
1
Packhorse camping
2
Paint
1
Painted signs and signboards
1
Painters
1
Painting
1
Pamphlets
1
Paneling
2
Panoramas
14
Parachutes
1
Parapets
10
Park buildings
198
Park facilities
1
Park naturalists
34
Park rangers
397
Park rangers' spouses
1
Parking
2
Parking lots
25
Parks
1
Parks--Barrier-free design--Rocky Mountains Region
2
Parks--California
2
Parks--Employees
191
Parks--Management
10
Parks--Public use
2
Parks--South Carolina
239
Parks--Vandalism
1
Parkways
52
Parkways--North Carolina
3
Parties
40
Passenger trains
1
Pastures
32
Pavements
5
Pavements--Cracking
7
Peat mosses
1
Pedestrian bridges
10
Pelicans
12
Perch
1
Performance awards
4
Person
24
Persons
13
Petrified forests
17
Petroleum
1
Pets
3
Phacelia
14
Phlox
2
Photograph collections
1
Photographers
4
Photographs
3
Photography
5
Photography of mountains
17
Photography of women
2
Photography of young men
1
Photography, Close-up
1
Photography, Panoramic
5
Photojournalists
1
Physical geology
1
Physicians
2
Phytoplankton
1
Pickup trucks
6
Picnic grounds
31
Picnic grounds--Public use
1
Picnics
9
Pictures in interior decoration
1
Piers
4
Pigs
1
Pile drivers
1
Pilot Mountain State Park (N.C.)
1
Pinaceae
15
Pine
11
Pine Forest Range (Nev.)
1
Pine cones
1
Pipe
2
Pipelines
9
Pistols
1
Pitch pine
4
Plant conservation
1
Plant cuttings
6
Plant ecology
1
Plantaginaceae
5
Planting (Plant culture)
22
Plants
33
Plants, Protection of
4
Plants--Effect of freezes on
2
Plants--Nomenclature
3
Plaques, plaquettes
5
Plateaus
5
Playgrounds
1
Pleistocene-Holocene boundary
1
Plowing
2
Plows
1
Plumbing
1
Poaching
1
Police chiefs
2
Police stations
1
Poliomyelitis
1
Pollution
2
Polytrichum
1
Ponds
18
Populus tremuloides
2
Porches
24
Portable radios
2
Portraits
5
Portraits, Group
18
Post office buildings
6
Potholes
1
Power shovels
6
Predatory animals--Control
1
Presidents--United States
4
Press agents
1
Princes
14
Princesses
2
Prohibition--United States
1
Projectors
6
Promenades (Pedestrian areas)
1
Proposal writing in community development
1
Prunus
1
Public buildings
11
Public buildings--Design and construction
5
Public buildings--Restrooms
6
Public comfort stations
24
Public laundries
1
Public officers
2
Public shelters
13
Public toilets
57
Public utilities
8
Puffballs
1
Pumping machinery
1
Pumping stations
11
Pumpkin
1
Pyrolaceae
1
Quarries and quarrying
5
Quercus prinus
1
Quercus velutina
1
Quilting
1
Raccoon
1
Radio
3
Radio and television towers
2
Radiocarbon dating
1
Railroad bridges
1
Railroad motorcars
1
Railroad rails
1
Railroad stations
6
Railroad tracks
3
Railroad trains
5
Railroads
7
Rain gauges
1
Rainbow trout
1
Rainstorms
1
Rakes
1
Ramps (Walkways)
1
Ranch roping
7
Ranchers
10
Ranches
219
Range management
59
Range plants--Control
50
Rangelands
50
Ranger stations
135
Rangers
12
Ranunculaceae
3
Ranunculus
1
Rapids
11
Rappelling
4
Rare plants
2
Raspberries
1
Ravines
13
Reading
1
Real property--Boundaries
3
Recreation
2
Recreation area parking facilities
84
Recreation areas
225
Red fox
3
Red maple
1
Red spruce
6
Red wolf
1
Red-cockaded woodpecker
1
Reflections
1
Reforestation
1
Rehabilitation
10
Reinforced concrete construction
1
Relief models
1
Religious gatherings
2
Relocation
1
Relocation (Housing)
1
Remote sensing
2
Repairing
3
Repellents
1
Reptiles
1
Rescue work
1
Rescues
1
Research/resources management report (Atlanta, Ga.)
1
Reservoir drawdown
1
Reservoirs
16
Rest homes
2
Restaurants
1
Restoration and conservation
1
Restrooms
1
Retaining walls
27
Retaining walls--Design and construction
1
Retirement
12
Rewards of merit
11
Rhododendron maximum
2
Rhododendrons
27
Rhyolite
5
Ribbons
3
Rifles
5
Rinehart, Mary Roberts, 1876-1958
1
Riprap
6
River Brand Rice Milling Company
1
River channels
5
Rivers
525
Riverside Geyser (Wyo.)
8
Road closures
1
Road construction
1
Road construction contracts
5
Road construction contracts--United States
3
Road construction workers
17
Road machinery
55
Road materials
16
Road rollers
12
Road work zones
9
Roads
907
Roads--Design and construction
119
Roads--Design and construction--Equipment and supplies
1
Roads--Earthquake effects
11
Roads--Flood damage
8
Roads--Guard fences
17
Roads--Interchanges and intersections
2
Roads--Maintenance and repair
66
Roads--Shoulders
1
Roads--Snow and ice control
55
Roads--Widening
6
Roadside improvement
21
Roadside litter
8
Rock climbing--Training
8
Rockefeller family
1
Rockfills
1
Rocks
198
Rockslides
39
Rocky Mountain National Park (Colo.)
13
Rocky Mountain spotted fever tick
1
Rocky Mountains
3
Rodents
2
Rodents--Control
2
Roller conveyors
4
Roof trusses
1
Roofing, Bituminous
1
Roofs
2
Root cellars
5
Roots (Botany)
2
Rope
1
Rosaceae
3
Roseroot
1
Rosy finches
1
Rotary tillers
1
Rubbing
4
Rubiaceae
2
Rubus
1
Ruffed grouse
3
Ruins
1
Rulers (Instruments)
2
Rules
1
Russians
5
Rutting of roads
3
Ryegrasses
4
Safes
1
Safety
1
Safety signs
2
Sage
2
Sagebrush
30
Salamanders
2
Salt licks
3
Sand
1
Sand and gravel plants
3
Sandstone
1
Sanitary landfills--Leaching
6
Sanitation
5
Santa Monica Bay (Calif.)
1
Santa Monica Mountains (Calif.)
2
Santa Monica Mountains National Recreation Area (Calif.)
4
Santa Rita Mountains (Ariz.)
1
Sassafras
1
Sawing
2
Saws
2
Saxifraga
3
Saxifragaceae
1
Scars
1
Scenic overlooks
46
School buildings
2
School children
2
School contests
11
Schools
3
Schools--Fires and fire prevention
2
Science--Experiments
2
Scientific apparatus and instruments
2
Scientists
10
Scotts Bluff National Monument (Neb.)
4
Scrap metals
13
Screens
2
Scrophulariaceae
3
Scrub pine
1
Seating furniture
1
Seats
4
Secretaries
4
Sedimentary rocks
1
Sedum
1
Seedlings
6
Seedlings--Protection
1
Seeds--Drying
1
Seeds--Harvesting
4
Seeds--Protection
1
Self-defense
4
Selling
1
Septic tanks
24
Service stations
2
Sewage
3
Sewage disposal
13
Sewage disposal plants
5
Sewage lagoons
1
Sewage sludge
2
Sewage sludge--Drying
2
Sewage--Purification
7
Sewage--Purification--Chlorination
1
Sewer-pipe
8
Sewer-pipe--Joints
1
Sewerage
9
Sewerage--Design and construction
1
Sewers
1
Shade-tolerant plants
1
Shagbark hickory
5
Shale
1
Sheds
32
Sheep
6
