Author
McHenry, George
4
Cox, Harold E.
3
Pennsylvania Railroad Technical & Historical Society. Philadelphia Chapter
3
Rohrbeck, Benson W.
3
America's Industrial Heritage Project
2
Arnold, Andrew Bernard
2
DeGraw, Ronald, 1942-2006,
2
Duffy, Edward W., 1947-
2
Kennedy, David Johnson, 1816-1898,
2
Kraft, Chip
2
Louis Berger Group
2
Matthew, J. Cecil
2
Meyers, Allen
2
North Pennsylvania Railroad Company
2
Philadelphia & Reading Railroad Co
2
Siebert, C. L.
2
Solomon, Brian, 1966-
2
Spivak, Joel
2
Springirth, Kenneth C.
2
Taber, Thomas T., III
2
United States. Bureau of Prisons
2
United States. Department of the Interior. Southwestern Pennsylvania Heritage Preservation Commission
2
Wilson, William Bender, 1839-1919
2
Wingert, Cooper H.,
2
Young, David W.
2
Albrecht, Harry P.
1
Alexander, Edwin P.
1
Alwine, Leonard E.
1
American Institute of Electrical Engineers
1
Andrews, Clinton T.
1
Archer, Robert F.
1
Awbury Arboretum (Philadelphia, Pa.)
1
Bacon, Margaret Hope
1
Baldwin, William C.,
1
Bellefonte Central Railroad
1
Bezilla, Michael
1
Bezilla, Michael,
1
Blockson, Charles L.
1
Boorse, J. W.
1
Borgnis, Mervin E.
1
Bowman, Stanley F.,
1
Brown, Andrew S.
1
Brown, R. W.
1
Brown, Revelle Wilson
1
Brown, Revelle Wilson, 1883-
1
Bucklew, Charles Rollins, 1821-1899
1
Casler, Walter C.
1
Central Electric Railfans' Association
1
Chester County Historical Society (West Chester, Pa.)
1
City History Society of Philadelphia
1
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