Author
Geological Survey (U.S.)
2
Beekly, A. L.
1
Campbell, Marius R. 1858-1940
1
Chesley, Paul, 1946-
1
Dannen, Donna, 1949-
1
Dannen, Kent, 1946-
1
Emerson, Benjamin Kendall, 1843-1932
1
Fountain, Andrew G.
1
Fountain, Andrew G.,
1
Geological Survey (U.S.),
1
Girty, George Herbert, 1869-1939
1
Krimmel, Robert M.
1
Krimmel, Robert M.,
1
Pelto, Mauri, 1961-
1
Rocky Mountain Nature Association
1
Smith, George Otis, 1871-1944
1
SpringerLink (Online service)
1
Trabant, Dennis
1
Trabant, Dennis,
1
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Public Lands, National Parks, and Forests
1
United States. National Park Service
1