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Monographie
U. S. geological exploration of the 40th parallel: Part I.: Paleontology
Meek F. B | Government printing office | 1876
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Monographie
United States geological exploration of the fortieth parallel Clarence King, geologist-in-charge: Vol. IV
Meek F. B, Hall James, Whitfield Robert, Ridgway | [s. n.] | 1877