Author
Duffy, Edward W., 1947-
2
North Pennsylvania Railroad Company
2
Bernhart, Benjamin L.,
1
Bernhart, John H. L. Dr.,
1
Bernhart, John L. Dr.,
1
Cary, Lorene
1
Chandler Brothers & Co
1
Diemer, Andrew K.,
1
DuPuis, Roger, II,
1
Harwood, Herbert H., Jr
1
J.G. Brill Company
1
Mansfield, Edward Deering, 1801-1880
1
Meyers, Allen
1
National Railway Historical Society. Philadelphia Chapter
1
Pennsylvania Railroad Technical & Historical Society. Philadelphia Chapter
1
Philadelphia
1
Philadelphia Dept. of City Transit
1
Philadelphia Rapid Transit Company
1
Simulation Systems Inc
1
Southeastern Pennsylvania Transportation Authority
1
Southeastern Pennsylvania Transportation Authority. Service Planning Department
1
Spivak, Joel
1
Springirth, Kenneth C.
1
Tyson, Job R. 1803-1858
1