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Geology of the wood and east Calhoun mines Central city district Gilpin county, Colorado / by Avery A. Drake.

By: DRAKE, Avery A.
Material type: materialTypeLabelBookSeries: Geological Survey Bulletin; 1032-C.Publisher: Washington : United States Government Printing Office, 1957Description: P. 130-170 + map. --.Content type: Texto (visual) Media type: sin mediación Subject(s): Colorado | Depósitos de minerales | Geología
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