An officer over the radio in Harbor Entrance Control Post(HEPC) Radio Room, Fort Moultrie, South Carolina
National Park Service
H.E.C.P. Radio Room; 6B; NOV81A3 8.
As group of visitors dine in Snowball, squatting guide and a woman play a Philco radio
Mammoth Cave National Park; National Park Service
Cave visitors, woman and a guide standing at a Philco radio in an empty Snowball Dining Room
Mammoth Cave National Park; National Park Service
Cave visitors, woman at a Philco radio in Snowball Dining Room while people eat behind her
Mammoth Cave National Park; National Park Service
Cave visitors, woman at a Philco radio in Snowball Dining Room while people eat behind her
Mammoth Cave National Park; National Park Service
Cave, Major Walter Ulrey of the volunteers of America delivering first religious broadcast from place known as Methodist Church, three fourths of a mile from historic entrance and 360 ft. below the surface, 1936
Mammoth Cave National Park; National Park Service
Cave, broadcast by WSM "Men at Work" program, a guide was interviewed taking the regular Frozen Niagara trip, 1939
Mammoth Cave National Park; National Park Service
Cave, broadcast by WSM "Men at Work" program, a guide was interviewed taking the regular Frozen Niagara trip, 1939
Mammoth Cave National Park; National Park Service
Cave, broadcast by WSM "Men at Work" program, a guide was interviewed taking the regular Frozen Niagara trip, 1939
Mammoth Cave National Park; National Park Service
Cave, group attending first religious broadcast from Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Cave, guide and announcer just before starting in the Frozen Niagara entrance for "Men at Work" program broadcast by WSM, 1939
Mammoth Cave National Park; National Park Service
Cave, guide and announcer just before starting in the Frozen Niagara entrance for "Men at Work" program broadcast by WSM, 1939
Mammoth Cave National Park; National Park Service
Cave, guide and announcer just before starting in the Frozen Niagara entrance for "Men at Work" program broadcast by WSM, 1939
Mammoth Cave National Park; National Park Service
Cave, part of the group which attended the first religious broadcast from Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Cave, part of the group which attended the first religious broadcast from Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Cave, part of the group which attended the first religious broadcast from Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Cave, part of the group which attended the first religious broadcast from Mammoth Cave, 1938
Mammoth Cave National Park; National Park Service
Effects of Regulated Lake Levels on Beaver in Voyageurs National Park, Minnesota
National Park Service Water Resources Division; National Park Service
Effects of Regulated Lake Levels on Muskrats in Voyageurs National Park, Minnesota
National Park Service Water Resources Division; National Park Service
Front view of the radio room panel showing WVEP, Harbor Entrance Control Post, 1943
National Park Service
Front view of Radio Room radio panel showing WVWP. Upstairs in H.E.C.P.
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