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1Subjects: “...Geology, Stratigraphic Devonian. http://id.loc.gov/authorities/subjects/sh85054093...”
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2by Pollastro, Richard M.Subjects: “...Geology, Stratigraphic Ordovician. http://id.loc.gov/authorities/subjects/sh85054103...”
Published 1991
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3Subjects: “...Geology, Stratigraphic Permian. http://id.loc.gov/authorities/subjects/sh85054107...”
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4Subjects: “...Geology, Stratigraphic. fast (OCoLC)fst00940727...”
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Government Document eBook