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Scale showing height of cave ceiling, Cox Case Mammoth Cave National Park; National Park Service
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1939-03-30
Scale showing height of cave ceiling, Cox Case Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with wooden rule in cave measuring formation Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with level rod in cave, showing height of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with level rod in cave, showing height of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with level rod in cave, showing height of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Returns from Banded Birds 1923 to 1926 Great Smoky Mountains National Park; National Park Service
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1927-12
Survey, man with level rod in cave, showing height of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with level rod in cave, showing height of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with level rod in cave, showing height of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Survey, man with right arm out in cave passage, showing size of cave Mammoth Cave National Park; National Park Service
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1939-03-30
Topo survey for Hemphill Knob administrative area, Blue Ridge Parkway, North Carolina Blue Ridge Parkway Topo Survey for Hemphill Knob, HQ Site, North Carolina Section 2R.
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1991-05-01
USGS Tower on Mount Guyot Great Smoky Mountains National Park Original Captions: In mapping the mountains, the USGS built towers on tops of various peaks. An automobile battery was used to light a light on the towers at night. USGS surveyors at the Andrew Johnson Hotel in Knoxville would take readings on the lights. USGS Tower on Mt. Guyot; III-S-16970, History - Historic Sites .In mapping the mountains, the USGS built towers on tops of various peaks. An automobile battery was used to light a light on the towers at night. USGS surveyors at the Andrew Johnson Hotel in Knoxville would take readings on the lights.USGS Tower on Mt. Guyot, III-S-16970, History - Historic Sites
1929-07-17
Report of examination and exploration of township 53S range 29 E, township 53S range 30E, located in Lee County, Florida (Funding) Electronic format produced as part of Reclaiming the Everglades, a collaborative project of the University of Miami, Florida International University, and the Historical Museum of Southern Florida, funded by the Library of Congress/Ameritech National Digital Library Program.; From the James F. Jaudon papers.
1917

Page 2 of at least 68
About 1,300 Items

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