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1Subjects: “...Geology, Stratigraphic Pennsylvanian....”
Government Document Book -
2by Maughan, Edwin K., 1926-1995Subjects: “...Geology, Stratigraphic....”
Published 1989
Government Document Microform Book -
3Subjects: “...Geology, Stratigraphic Mississippian. http://id.loc.gov/authorities/subjects/sh85054100...”
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