Author
Philadelphia Transportation Company
2
Rand McNally and Company
2
Southeastern Pennsylvania Transportation Authority
2
ADC (Firm)
1
Franklin Survey Company,
1
Gulf Oil Corporation
1
Hartranft, Rufus C.
1
Heilprin, Angelo, 1853-1907
1
Keystone Automobile Club
1
Reichard, L. E.
1
Simulation Systems Inc
1
Smith, Elvino V., 1870-1932
1
Tanner, Henry Schenck, 1786-1858
1
Taylor, Frank H. 1846-1927
1
United States. Bureau of the Census
1
Volk, Albert
1