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1by Steele, Brenda A.Subjects: “...Geology, Stratigraphic Permian....”
Published 1982
Government Document Book -
2by Steele, Brenda A.Subjects: “...Geology, Stratigraphic Permian....”
Published 1987
Government Document Book -
3by Steele, Brenda A.Subjects: “...Geology, Stratigraphic Permian. http://id.loc.gov/authorities/subjects/sh85054107...”
Published 1987
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