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1by Cressman, Earle Rupert, 1923-Subjects: “...Geology, Stratigraphic Permian....”
Published 1953
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2by Cressman, Earle Rupert, 1923-Subjects: “...Geology, Stratigraphic. http://id.loc.gov/authorities/subjects/sh85054086...”
Published 1955
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3by Cressman, Earle Rupert, 1923-Subjects: “...Geology, Stratigraphic Precambrian. http://id.loc.gov/authorities/subjects/sh85054110...”
Published 1985
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4Subjects: “...Geology, Stratigraphic Permian. http://id.loc.gov/authorities/subjects/sh85054107...”
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5Subjects: “...Geology, Stratigraphic Proterozoic. http://id.loc.gov/authorities/subjects/sh85054087...”
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6Subjects: “...Geology, Stratigraphic Proterozoic. http://id.loc.gov/authorities/subjects/sh85054087...”
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Government Document eBook