Author
United States. National Park Service
1,188
United States. Congress. Senate. Committee on Energy and Natural Resources
828
United States. Congress. House. Committee on Natural Resources
306
United States. Congress. House. Committee on Resources
251
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks
190
United States. Congress. House. Committee on Interior and Insular Affairs
178
United States
163
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Public Lands, National Parks, and Forests
104
United States. National Park Service. Denver Service Center
97
George Clapp Vaillant Book Fund
95
Olmsted Center for Landscape Preservation (U.S.)
92
United States. Advisory Council on Historic Preservation
85
National Trust for Historic Preservation in the United States
83
National Register of Historic Places
80
GPO MARCIVE
79
Harpers Ferry Center (U.S.)
74
Pennsylvania Historical and Museum Commission
71
ProQuest Ebook Subscriptions
56
United States. National Park Service. Interagency Resources Division
55
ProQuest (Firm)
54
Auwaerter, John E. (John Eric), 1964-
52
United States. Congress. House. Committee on Resources. Subcommittee on National Parks, Recreation, and Public Lands
47
New Jersey. Department of Transportation
42
Porter, Richard L.
42
America's Industrial Heritage Project
38
United States. Congress. Senate
38
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on National Parks, Historic Preservation, and Recreation
36
United States. National Park Service. Preservation Assistance Division
36
Curry, George W., 1940-
34
United States. Bureau of Land Management
34
China. Guo jia wen wu ju
33
United States. National Park Service. History Division
28
Unesco
27
United States. National Park Service. Cultural Resources
27
National Trust (Great Britain)
26
United States. Department of the Interior
26
Historic American Buildings Survey/Historic American Engineering Record
25
Geological Survey (U.S.)
24
Kennedy, Roger G.
23
RBA Group. Cultural Resource Unit
23
United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on National Parks and Recreation
23
United States. Department of the Interior. Southwestern Pennsylvania Heritage Preservation Commission
23
United States. National Park Service. Southeast Regional Office. Cultural Resources Division
23
JSTOR
22
United States. Congress. Senate. Committee on Interior and Insular Affairs. Subcommittee on Parks and Recreation
21
United States. Federal Highway Administration
21
United States. National Park Service. Rocky Mountain Regional Office
21
Getty Conservation Institute
20
United States. National Park Service. North Atlantic Regional Office. Division of Cultural Resources
20
United States. Superintendent of Documents
20
more ...