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1by Loughlin, G. F. (Gerald Francis), 1880-1946Subjects: “...Zinc ores Colorado Leadville....”
Published 1918
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2by Hazen, Scott W.Subjects: “...Zinc mines and mining Colorado Ouray County....”
Published 1949
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4Published 1985Subjects: “...Zinc Colorado Williams River Mountain Region Maps....”
Government Document Map -
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