Author
Taber, Thomas T., III
7
Wilson, William Bender, 1839-1919
5
Baltimore and Ohio Railroad Company
4
McHenry, George
4
Pennsylvania Railroad Technical & Historical Society. Philadelphia Chapter
4
Cox, Harold E.
3
LaRoche, Cheryl Janifer
3
Pennsylvania Railroad
3
Rohrbeck, Benson W.
3
Solomon, Brian, 1966-
3
Albrecht, Harry P.
2
America's Industrial Heritage Project
2
Arnold, Andrew Bernard
2
Association of American Railroads
2
Bezilla, Michael
2
Blockson, Charles L.
2
Carter, Charles Frederick, 1863-1939
2
Center for Canal History and Technology (Easton, Pa.)
2
Dacus, J. A.
2
DeGraw, Ronald, 1942-2006,
2
Duffy, Edward W., 1947-
2
Furness, Evans & Co
2
Gibb, Hugh R.
2
Haupt, Herman, 1817-1905
2
Historical Records Survey (U.S.) New Jersey
2
Holton, James L.
2
Kennedy, David Johnson, 1816-1898,
2
Kraft, Chip
2
Kramer, Frederick A.
2
Louis Berger Group
2
Matthew, J. Cecil
2
Meyers, Allen
2
Middleton, William D., 1928-2011
2
National Railway Historical Society
2
New Jersey Historical Records Survey Project
2
New Jersey State Planning Board
2
Newcomen Society of the United States
2
North Pennsylvania Railroad Company
2
Pennsylvania Railroad Technical & Historical Society
2
Philadelphia & Reading Railroad Co
2
Railroadians of America
2
Railway & Locomotive Historical Society
2
Siebert, C. L.
2
Springirth, Kenneth C.
2
Stover, John F.
2
United States. Bureau of Prisons
2
United States. Department of the Interior. Southwestern Pennsylvania Heritage Preservation Commission
2
White, John H., 1933-
2
Wilson, William Hasell, 1811-1902
2
YA Pamphlet Collection (Library of Congress)
2
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