Author
Philadelphia Rapid Transit Company
4
Metropolitan Rail Road Company (Philadelphia, Pa.)
2
Philadelphia Record
2
Smith, J. L.
2
Wagner, Samuel Tobias
2
Webster, George S.
2
Cox, Harold E.
1
Elsner, Henry
1
Gant, S. C.
1
Hood, Clifton
1
IRT Subway System (New York, N.Y.)
1
Interboroudh Rapid Transit Company (New York)
1
Jones, Clarence
1
Mallowe, Mike
1
New York City Transit Authority
1
Philadelphia (Pa.) Dept. of Public Works
1
Philadelphia (Pa.). Department of Public Property
1
Philadelphia Rapid Transit Company Glass Plate Negative Collection
1
Quarles, E. C.
1
Robert R. Nathan Associates
1
Southeastern Pennsylvania Transportation Authority
1
Southeastern Pennsylvania Transportation Authority. Service Planning Department
1
Turnpike Engineers Inc
1
Twining, William S.
1
United States. Urban Mass Transportation Administration
1
Vible, Richard
1
Webster, George S. 1855-1931
1
Wilson, Joseph M.
1