Author
United States. National Park Service
Soullière, Laura E.
3
Harpers Ferry Center (U.S.)
2
United States. Bureau of Land Management
2
United States. Forest Service. Rocky Mountain Region
2
United States. National Park Service. Denver Service Center
2
American Association for State and Local History
1
Brown, Sharon A.
1
Cane River National Heritage Area Commission (U.S.)
1
Cuyahoga Valley National Park (Agency : U.S.)
1
Cuyahoga Valley National Park (Agency : U.S.),
1
Frank and Virginia Williams Collection of Lincolniana (Mississippi State University. Libraries)
1
Gnesios, Gregory M.
1
Greater Yellowstone Winter Wildlife Working Group
1
Harpers Ferry Center (U.S.),
1
International Air Issues Workshop
1
International Air Issues Workshop Waterton Lakes National Park, Alta.)
1
Marsh, John B.
1
Medrano, Mike
1
National Conference of State Historic Preservation Officers
1
Navajo Tribe of Arizona, New Mexico & Utah
1
Olliff, Tom
1
Paige, John C.
1
Parks Canada
1
Porter, William F.
1
Saudi Arabia. Wizārat al-Zirāʻah wa-al-Miyāh
1
Small, Sally
1
United States. Forest Service
1
United States. Forest Service. Pacific Northwest Region
1
United States. National Aeronautics and Space Administration
1
United States. National Aeronautics and Space Administration. EOS Project Science Office,
1
United States. Office of Archeology and Historic Preservation
1