Author
Graham, Daniel A., 1948-
3
Paskoff, Paul F.
2
Bining, Arthur Cecil, 1893-1957
1
Eggert, Gerald G.
1
Kurjack, Dennis C.
1
Shoemaker, Henry Wharton, 1880-
1
United States. Department of the Interior. Southwestern Pennsylvania Heritage Preservation Commission
1
United States. National Park Service
1
United States. National Park Service. Denver Service Center
1