Author
Philadelphia Rapid Transit Company
5
Philadelphia Record
5
Southeastern Pennsylvania Transportation Authority
4
Philadelphia (Pa.) Urban Traffic and Transportation Board
3
Philadelphia (Pa.). Urban Traffic and Transportation Board
3
Philadelphia Transportation Company
3
Southeastern Pennsylvania Transportation Authority. Cartography Department
2
Hartwell, Edward M.
1
Jones, Clarence
1
Meyers, Allen
1
Moore, J. Hampton 1864-1950
1
National Railway Historical Society. Philadelphia Chapter
1
Philadelphia (Pa.). Department of Public Property
1
Philadelphia City Planning Commission
1
Philadelphia Rapid Transit Company Glass Plate Negative Collection
1
Philadelphia Transportation Company,
1
Robert R. Nathan Associates
1
Sechler, Robert P.
1
Simulation Systems Inc
1
Smith, Charles Morton
1
Southeastern Pennsylvania Transportation Authority. Service Planning Department
1
Spivak, Joel
1
Turnpike Engineers Inc
1
Twining, William S.
1
Wilbur Smith and Associates
1
Williams, Gerry
1
Wolfinger, James,
1