Lower Triassic ammonoids of North America / by James Perrin Smith.
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TextSeries: Geological Survey professional paper ; no. 167.Publication details: Washington : U.S. Gov't. Print. Off., 1932.Description: v, 199 p. : ill., map, 81 plates ; 29 cmSubject(s): LOC classification: - QE75 .P9 no. 167
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At head of title: United States Department of the Interior.
Bibliography: p. 4-6.
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