Origin and microfossils of the oil shale of the Green River formation of Colorado and Utah, by Wilmot H. Bradley.
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TextSeries: U. S. Geological Survey. Professional paper 168Publication details: Washington, U.S. Govt. Print. Off., 1931.Description: vi, 58 p. incl. maps, tables, diagr. 28 p. (incl. fold. map, 5 fold diagr.) 29 cmSubject(s): LOC classification: - QE75 .P9 no. 168
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At head of title: United States Department of the Interior.
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