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Paleozoic paleogeography of the western United States / John H. Steewart, Calvin H. Stevens, A. Eugene Fritsche. - Los Angeles, Calif. : Pacific Section, Society of Economic Paleontologists and Mineralogists, 1977. - 502 p. ; 28 cm. - Pacific section. 7. .

Incluye bibliografia.

LC Class. No.: QE640 / P32 1977