Autor
Geological Survey (U.S.)
Zandle, Gerald L
230
Pennsylvania Bureau of Topographic and Geologic Survey
183
Pennsylvania Department of Internal Affairs
163
Bromery, Randolph W (Randolph Wilson), 1926-2013
153
Bromery, Randolph Wilson, 1926-
150
Henderson, John R
52
Wood, Gordon H (Gordon Harry), 1919-
51
Pennsylvania Department of Environmental Resources
31
Pittillo, D. R
19
Arndt, Harold H
17
Boynton, G. R
17
Stose, George Willis, 1869-1960
17
Natoff, Nora C
15
Schweinfurth, Stanley P
15
Butts, Charles, 1863-1946
13
Delaware River Basin Commission
13
Drake, Avery Ala, 1927-
13
Rothrock, Howard E (Howard Eugene), 1893-1983
13
Trexler, J. Peter, 1926-
13
Bennett, Bruce L
12
Kent, Bion H (Bion Huntley), 1925-
12
Flippo, Herbert N
11
Boynton, G. R (George Robert), 1935-
10
Epstein, Jack Burton, 1935-
10
Pennsylvania Department of Conservation and Natural Resources
10
Pennsylvania Department of Environmental Protection
10
Susquehanna River Basin Commission
10
United States Army. Corps of Engineers
10
Bascom, F (Florence), 1862-1945
9
Danilchik, Walter
9
Roen, John B
9
Williams and Heintz Map Corporation
9
Farlekas, George M., 1936-
8
Shaw, L. C
8
West Virginia Geological and Economic Survey
8
Appalachian Regional Commission
7
Campbell, Marius R (Marius Robinson), 1858-1940
7
Geological Survey of Ohio
7
Kehn, Thomas M
7
Munn, M. J (Malcolm John), 1874-1949
7
Pennsylvania Department of Forests and Waters
7
Pomeroy, John S., 1929-
7
Reed, Lloyd A
7
Stone, Ralph W (Ralph Walter), 1876-1964
7
United States Environmental Protection Agency
7
Berryhill, Henry L., Jr (Henry Lee), 1921-2013
6
Clapp, Frederick G (Frederick Gardner), 1879-1944
6
Foster, Margaret Dorothy, 1895-
6
Geological Survey of Pennsylvania
6
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