Author
prev ...
Hathaway, Dale A., 1951-
1
Hessen, Robert
1
Historical Society of Western Pennsylvania Museum Program Dept
1
Hubbard, Elbert, 1856-1915
1
Hull, Warren
1
Ingham, John N.
1
Jones, Barbara L.
1
Keystone View Company
1
Kuchta, David
1
Lukens Steel Company
1
Magda, Matthew S.
1
Maloney, Thomas J.
1
Mango, Mark
1
May, Earl Chapin, 1873-1960
1
Miner, Curtis
1
Misa, Thomas J.
1
Muller, Edward K.
1
O'Connor, Harvey, 1897-1987
1
Pearson, Thomas, 1805-
1
Pennsylvania Bureau of Industrial Statistics
1
Pennsylvania Historical and Museum Commission
1
Pennsylvania State University. EMS Museum & Art Gallery
1
Perelman, Dale Richard,
1
Peter A. Frasse and Company
1
Redlich, Fritz, 1892-1978
1
Rowan, Richard L.
1
Schachter, Judith, 1941-
1
Schoff, Wilfred H. 1874-1932
1
Schroeder, Gertrude G.
1
Schruers, Eric Jon
1
Schwoyer, Kerry
1
Serrin, William
1
Smith, Charles H.
1
Steel Founders' Society of America. District No. 1
1
Strohmeyer, John, 1924-2010
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 Steel Corp
1
United States. Department of the Interior. Southwestern Pennsylvania Heritage Preservation Commission
1
United States. National Park Service. Denver Service Center
1
University of Michigan. Population Studies Center
1
Walker, Charles Rumford, 1893-
1
Wall, Joseph Frazier
1
West Duluth Land Co
1
Wharton School. Industrial Research Unit
1
White, Victor Francis, 1902-
1