Author
Geological Survey (U.S.)
Bromery, Randolph W. 1926-2013
10
Zandle, Gerald L.
8
Bennett, Bruce L. 1917-2003
2
Henderson, John R.
2
Lash, Gary George
2
McManus, B. Craig
2
New Hope (Pa.)
2
Rothrock, Howard E. 1893-1983
2
Wagner, Holly C. 1918-2005
2
Algermissen, Sylvester Theodore, 1932-2006
1
Bates, Robert Glenn, 1923-
1
Chester County Water Resources Authority
1
Danilchik, Walter
1
Drake, Avery Ala, 1927-
1
Epstein, Jack Burton, 1935-
1
Haley, Boyd Raymond, 1922-
1
Kehn, Thomas M.
1
Lyttle, Peter T.
1
McClure, Cynthia Rowland
1
Pennsylvania. Department of Internal Affairs
1
Reagor, B. Glen
1
Schreffler, Curtis L.
1
Stover, Carl W.
1
U.S. Atomic Energy Commission. Division of Biology and Medicine
1
Water Resources Council (U.S.)
1