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Author/Creator
- United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks9
- United States. Congress. House. Committee on Rules3
- United States. Congress. Senate. Committee on Energy and Natural Resources3
- Brisbane, Robert1
- Brown, Margie Coffin, 1963-1
- Godfrey, Anthony1
- Lumsden, Robert1
- National Symposium on Trails (1971 : Washington, D.C.)1
- Olmsted Center for Landscape Preservation (U.S.)1
- Quiñones Hernández, Luis Carlos, 1958-1
- Raymo, Chet1
- Saltzman, Katarina1
- Svensson, Daniel1
- Sörlin, Sverker1
- United States. National Park Service1
- Universidad Juárez del Estado de Durango1
- Vekasi, Jim1
- Vivian, Victor1