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1by Douglass, Raymond C. (Raymond Charles)Subjects: “...Paleontology Permian....”
Published 1970
Government Document Book -
2by Douglass, Raymond C. (Raymond Charles)Subjects: “...Paleontology Permian....”
Published 1967
Government Document Book -
3by Douglass, Raymond C. (Raymond Charles)Subjects: “...Paleontology Permian. http://id.loc.gov/authorities/subjects/sh85097140...”
Published 1970
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4Stratigraphy and paleontology of the uppermost Pennsylvanian and lowermost Permian rocks in Kansas /by Mudge, Melville R., 1921-2009, Yochelson, Ellis L. (Ellis Leon), 1928-2006, Douglass, Raymond C. (Raymond Charles)Subjects: “...Paleontology Permian. http://id.loc.gov/authorities/subjects/sh85097140...”
Published 1962
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