Author
Geological Survey (U.S.)
139
Bromery, Randolph W. 1926-2013
49
Zandle, Gerald L.
48
Wood, Gordon H. 1919-
24
Chester County Water Resources Authority
15
Geological Survey (U.S.),
15
Pennsylvania. Bureau of Topographic and Geologic Survey
14
Drake, Avery Ala, 1927-
10
Epstein, Jack Burton, 1935-
9
Appalachian Regional Commission
8
Henderson, John R.
8
Arndt, Harold H.
7
New Hope (Pa.)
7
Kent, Bion H. 1925-
6
Trexler, J. Peter, 1926-
6
Boynton, G. R. 1935-
5
Briggs, Reginald P., 1929-2009
5
McManus, B. Craig
5
Pittillo, D. R.
5
Schreffler, Curtis L.
5
Schweinfurth, Stanley P.
5
Bennett, Bruce L. 1917-2003
4
Danilchik, Walter
4
Kohl, William R.
4
Roen, John B.
4
Berryhill, Henry L., Jr. 1921-2013
3
Kehn, Thomas M.
3
Lash, Gary George
3
McManus, B. Craig,
3
Minard, James P.
3
Owens, James Patrick, 1924-
3
Pomeroy, John S., 1929-
3
Rothrock, Howard E. 1893-1983
3
United States. Defense Mapping Agency. Hydrographic/Topographic Center
3
United States. National Park Service,
3
Williams and Heintz Map Corporation
3
Aaron, John M., 1936-
2
Bergin, M. J. 1927-
2
Bushnell, Kent O.
2
Chester County Water Resources Authority,
2
Davies, William E. 1917-
2
Garges, John A.,
2
Gray, Carlyle
2
Hale, Lindsay B.,
2
Kuchinski, John G.
2
Lyttle, Peter T.
2
Pennsylvania. Department of Internal Affairs
2
Petty, A. J.
2
Subitzky, Seymour, 1923-
2
Susquehanna River Basin Commission
2
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