Author
United States. National Park Service
72
United States. National Park Service,
23
United States. National Park Service. Natural Resource Stewardship and Science,
17
United States. Forest Service
11
Library of Congress. Congressional Research Service,
10
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks, Historic Preservation, and Recreation
10
Comay, Laura B.,
9
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks
9
United States. Congress. Senate. Committee on Energy and Natural Resources
6
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks,
6
United States. Forest Service,
6
United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on National Parks and Public Lands
5
United States. Congress. House. Committee on Natural Resources,
5
Conservation Study Institute (U.S.)
4
Geological Survey (U.S.),
4
Natural Resource Program Center (U.S.),
4
United States. Congress. House. Committee on Resources. Subcommittee on National Parks, Forests, and Lands
4
United States. Congress. Senate. Committee on Energy and Natural Resources,
4
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Public Lands, National Parks, and Forests
4
United States. National Park Service. Denver Service Center
4
United States. National Park Service. Division of Publications
4
Wieczorek Hudenko, Heather,
4
Decker, Daniel J.,
3
Geological Survey (U.S.)
3
Harpers Ferry Center (U.S.)
3
National Recreation and Park Association
3
Rothman, Hal, 1958-2007
3
Soullière, Laura E.
3
Tilden, Freeman, 1883-1980
3
Tuttle, Sherwood D., 1918-
3
U.S. Fish and Wildlife Service,
3
United States. Congress. House. Committee on Natural Resources. Subcommittee on National Parks, Forests, and Public Lands (2007-2013)
3
United States. Congress. House. Committee on Resources
3
United States. Congress. House. Committee on Resources. Subcommittee on National Parks and Public Lands
3
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Parks, Historic Preservation, and Recreation
3
United States. National Park Service. Geologic Resources Division
3
Copping, Suzanne E.
2
Delaware & Lehigh National Heritage Corridor Commission
2
Geospatial Service and Technology Center (U.S.),
2
Hanson, Mary
2
Harris, Ann G.
2
Harris, David V.
2
Heniff, Bill,
2
Kempthorne, Dirk, 1951-
2
Knowlton, Roger
2
Machlis, Gary E.
2
Mackintosh, Barry
2
National Geographic Society (U.S.),
2
National Parks and Conservation Association
2
National Register of Historic Places
2
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