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Author: Geological Survey (U.S.)
Author: Pennsylvania. Bureau of Topographic and Geologic Survey
Region: Pennsylvania
Language: English
Subject: Geology
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Geological Survey (U.S.)
Pennsylvania. Bureau of Topographic and Geologic Survey
5
Epstein, Jack Burton, 1935-
1
Glaeser, J. Douglas
1
Kreimeyer, Deborah F.
1
Lyttle, Peter T.
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1
Roen, John B.
1
Schweinfurth, Stanley P.
1
Sevon, William D.
1
United States. Bureau of Mines
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