Author
Geological Survey (U.S.)
120 results
Pennsylvania. Bureau of Topographic and Geologic Survey
65 results
Wood, Gordon H. (Gordon Harry), 1919-
25 results
Epstein, Jack Burton, 1935-
16 results
Drake, Avery Ala, 1927-
15 results
United States. Bureau of Mines
14 results
Pennsylvania. Department of Internal Affairs
12 results
ProQuest (Firm)
11 results
Schweinfurth, Stanley P.
11 results
Sevon, William D.
11 results
Berg, Thomas M.
10 results
Kent, Bion H. (Bion Huntley), 1925-
10 results
Trexler, J. Peter, 1926-
9 results
Arndt, Harold H.
8 results
Geological Survey (U.S.). Water Resources Division
8 results
Stose, George Willis, 1869-1960
8 results
Edmunds, William E.
7 results
Faill, Rodger T.
7 results
Roen, John B.
7 results
Willard, Bradford, 1894-
7 results
Berryhill, Henry L., Jr. (Henry Lee), 1921-2013
6 results
Kehn, Thomas M.
6 results
Lash, Gary George
6 results
Slonecker, E. Terrence
6 results
Thornberry, Trista L.
6 results
Wells, Richard B.
6 results
Butts, Charles, 1863-1946
5 results
Geyer, Alan R.
5 results
Glover, Albert D.
5 results
Inners, Jon D.
5 results
Jonas, Anna I. (Anna Isabel), 1881-1974
5 results
Pennsylvania. Topographic and Geological Survey Commission
5 results
American Geophysical Union
4 results
Bascom, F. (Florence), 1862-1945
4 results
Darton, Nelson Horatio, 1865-1948
4 results
Geological Survey of Pennsylvania
4 results
Heyman, Louis
4 results
International Geological Congress
4 results
Lyttle, Peter T.
4 results
MacLachlan, David B.
4 results
McGlade, William G.
4 results
Milheim, L. E.
4 results
Patterson, E. D. (Elmer Davisson)
4 results
Pennsylvania. Bureau of State Parks
4 results
Pennsylvania. Department of Conservation and Natural Resources
4 results
Pennsylvania. Department of Transportation
4 results
Root, Samuel I.
4 results
Schiner, George R., 1926-
4 results
Williams and Heintz Map Corporation
4 results
Wilshusen, John P.
4 results
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