Author
Philadelphia Rapid Transit Company
4
Philadelphia Record
2
Southeastern Pennsylvania Transportation Authority. Service Planning Department
2
Elsner, Henry
1
Gant, S. C.
1
Hagley Museum and Library
1
Jones, Clarence
1
Metropolitan Rail Road Company (Philadelphia, Pa.)
1
Philadelphia (Pa.). Department of Public Property
1
Philadelphia Rapid Transit Company Glass Plate Negative Collection
1
Robert R. Nathan Associates
1
Smith, J. L.
1
Southeastern Pennsylvania Transit Authority
1
Turnpike Engineers Inc
1
Twining, William S.
1
Vible, Richard
1