Author
Gummere, John, 1784-1845
7
Association of Research Libraries, Washington, Dc. Office ofManagement Services
6
Scull, Nicholas
6
Delaware. Division of Highways. Location and Environmental Studies Office
5
United States. Bureau of Chemistry and Soils
5
Delaware. Bureau of Archaeology and Historic Preservation
4
Philadelphia Commission on AIDS
4
United States. Federal Highway Administration
4
Aycrigg, Benjamin
3
Bell, William Abraham
3
Cleveland and Pittsburgh Railroad Company
3
Geological Survey of New Jersey
3
Gibson, Robert
3
Leonard Davis Institute of Health Economics
3
Lukens, John
3
Pennsylvania State College. School of Agriculture
3
Pennsylvania. Bureau of Topographic and Geologic Survey
3
Robinson, Moncure, 1802-1891
3
U.S. Coast and Geodetic Survey
3
United States. Army. Corps of Engineers
3
Unknown author
3
Association of Practical Surveyors of West New Jersey
2
Atkinson, C. H. 1906-
2
Baltimore and Ohio Railroad Company
2
Board of Proprietors of the Eastern Division of New Jersey
2
Bobo, Lawrence
2
Brunner, Edmund de S. 1889-1973
2
Burrows, Janice H.
2
Campbell, Henry R.
2
Central planning board of Elizabeth, Linden, Hillside, Roselle, Roselle Park and Union
2
Churchman, George 1730-1814
2
Clark, Barton M., Comp
2
Clemson, Thomas Green, 1807-1888
2
Cook, George Hammell, 1818-1889
2
Custer, Jay F., 1955-
2
Day, I. E.
2
Fernon, Thomas S. 1818-1896
2
Heite, Edward F.
2
Jess, Zachariah
2
Kisch, Egon Erwin, 1885-1948
2
Leaming, Aaron 1715-1780
2
Lewisburg, Centre and Spruce Creek Railroad
2
Moore, Samuel T. 1855-
2
Morse, H. N. 1887-1977
2
Morton, A. C.
2
North Pennsylvania Railroad Company
2
Pennsylvania Railroad
2
Philadelphia Bureau of Surveys
2
Philadelphia Chamber of Commerce
2
Philadelphia Hospital and Health Survey Committee
2
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