Author
ADC (Firm)
24
Rand McNally and Company
16
Smith, J. L.
11
Alexandria Drafting Company
8
American Automobile Association
6
Hawley, Joseph R. 1826-1905
6
Long, John Hamilton
6
U.S. Coast and Geodetic Survey
5
Charles D. Hevenor Company
4
DeLorme Mapping Company
4
Geological Survey (U.S.)
4
Krebs, Charles G.
4
Kümmerly + Frey
4
Lindenkohl, A.
4
National Geographic Society (U.S.). Cartographic Division
4
Pennsylvania. Department of Conservation and Natural Resources
4
Philadelphia Transportation Company
4
Tanner, Henry Schenck, 1786-1858
4
United States. National Park Service
4
Bachmann, John
3
Barnes, R. L.
3
E.P. Noll & Co
3
Gardner, David E.
3
Hallwag AG
3
Hartranft, Rufus C.
3
John Bartholomew & Co. (Publishers)
3
Jonathan Sheppard Books
3
MacInnes, Sharon Cook
3
Melish
3
Mitchell
3
Mitchell, S. Augustus 1792-1868
3
National Geographic Society (U.S.)
3
Nicholson, W. L. 1825-1895
3
Pennsylvania. Bureau of Topographic and Geologic Survey
3
Southeastern Pennsylvania Transportation Authority
3
United States Coast Survey
3
United States. Bureau of the Census
3
Weinberg, Allen
3
Bache, A. D. 1806-1867
2
Big Bus Company of Pennsylvania
2
C.S. Hammond & Company
2
Cappon, Lester Jesse, 1900-
2
Colton
2
Colton, J. H.
2
Cruchley, G. F.
2
Daly, John, 1934-
2
DenBoer, Gordon
2
Duportail, Antoine-Jean-Louis Le Bègue de Presle, 1743-1802
2
Esselte kartor (Firm)
2
Fairmount Park Commission (Philadelphia, Pa.)
2
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