Economic Geology of the Georgetown Quadrangle (Together with the Empire District) Colorado, with General Geology.
Contributors: Spurr, J.E.; Garrey, G.H.; Ball, S.H.
Series: U.S. Geological Survey professional paper -- 63
Publisher: s.n
Published: 1908
Place of publication: S.l
Language: eng
Notes: Copy 2 Hard Copy

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