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Subject: Geology, Stratigraphic
Region: Pennsylvania
Author: Pennsylvania. Bureau of Topographic and Geologic Survey
Institution
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Author
Pennsylvania. Bureau of Topographic and Geologic Survey
3
Geological Survey (U.S.),
2
Epstein, Anita G., 1937-
2
Epstein, Jack Burton, 1935-
1
Berryhill, Henry L., Jr. 1921-2013,
1
Kent, Bion H. 1925-
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1
Kimmel, Grant E.,
1
Schiner, George R., 1926-
1
Schweinfurth, Stanley P.,
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