Author
Albrecht, Harry P.
1
Alexander, Edwin P.
1
Alwine, Leonard E.
1
America's Industrial Heritage Project
2
American Institute of Electrical Engineers
1
Andrews, Clinton T.
1
Archer, Robert F.
1
Arnold, Andrew Bernard
2
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
Clarke, W. T.,
1
Cox, Harold E.
3
Creighton, Thomas
1
Dattolo, Mari D'Albora
1
DeGraw, Ronald, 1942-
1
DeGraw, Ronald, 1942-2006,
2
Denney, John D.
1
Denney, John Dewitt, Jr
1
DiRisio, Elizabeth Hoover
1
Diemer, Andrew K.,
1
Dixon, Stuart P.
1
DuPuis, Roger, II,
1
Duffy, Edward W., 1947-
2
Dugan, Mary Larkin
1
Elliott, Joseph E. B.,
1
Elsner, Henry
1
Fernon, Thomas S.
1
Flanagan, Thomas F.
1
Foesig, Harry
1
Garforth, Harry
1
Garrett, Thomas, 1789-1871
1
George de Benneville Keim Memorial Collection
1
Germantown Historical Society
1
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