A quarter century of mineral production, by E. P. Rothrock.
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TextSeries: Report of investigations (South Dakota Geological Survey) ; no. 13.Publication details: Vermillion, South Dakota, University of South Dakota, 1932.Description: 55 l. illusSubject(s): LOC classification: - TN24.S8 R62
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At head of title: South Dakota State Geological Survey, E. P. Rothrock, State Geologist.
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