Author
Åkerman, Rich. 1837-1922
2
Palmcrantz, H.
2
Alan Wood Iron and Steel Co
1
Beard, Chuck
1
Bell, Thomas, 1903-1961
1
Bethlehem Steel Company
1
Bezanson, Anne
1
Bining, Arthur Cecil, 1893-1957
1
Elvgren, Gillette
1
Favorini, Attilio, 1943-
1
Federal Reserve Bank of Philadelphia
1
Graham, Laurie
1
Gray, Robert Davis, 1909-
1
Historical Society of Western Pennsylvania Museum Program Dept
1
Jones, Barbara L.
1
Keystone View Company
1
Muller, Edward K.
1
Pennsylvania Bureau of Industrial Statistics
1
Perelman, Dale Richard,
1
Schachter, Judith, 1941-
1
Swank, James Moore, 1832-1914
1
Sweden Kommissionen för Sveriges deltagande i Verldsutställningen i Filadelfia, 1876
1
Sweden. Kommissionen för Sveriges deltagande i Verldsutställningen i Filadelfia, 1876
1
Tarr, Joel A. 1934-
1
Taylor, Frank H. 1846-1927
1
United States. Department of the Interior. Southwestern Pennsylvania Heritage Preservation Commission
1
United States. National Park Service. Denver Service Center
1
White, Victor Francis, 1902-
1