... Common minerals and rocks, their occurrence and uses, by R. D. George.
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TextSeries: Colorado, Geological Survey, Bulletin 12Publication details: Denver, Colo., Eames bros., state printers, 1917.Description: 463 p. illus., fold. map, diagrs. 24 cmSubject(s): LOC classification: - QE91 .A4 no. 12
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