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Stereoview (L): Down in a Colorado gold mine--taking out ore Eagle River Canyon Colorado U.S.A.
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Geology and ore deposits of the Gold brick district, Colorado, (Colorado Geological Survey. Bulletin)
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Gold Occurrences of Colorado (Resources Series Number 28)
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Historic Print (M): Down in a Colorado gold mine--taking out ore, Eagle River Canyon, Colorado, U.S.A.
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Silver Mining Regions of Colorado: With Some Account of the Different Processes Now Being Introduced for Working the Gold Ores of That Territory - Primary Source Edition
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Historic Print (L): Down in a Colorado gold mine--taking out ore, Eagle River Canyon, Colorado, U.S.A.
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Silver Mining Regions Of Colorado: With Some Account Of The Different Processes Now Being Introduced For Working The Gold Ores Of That Territory (1865)
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Historic Print (M): Down in a Colorado gold mine--taking out ore, Eagle River Canyon, Colorado, U.S.A.
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ORIGINAL PATENT APPLICATION NUMBER 13,537 FOR A PROCESS FOR PRECIPITATING GOLD AND OTHER PRECIOUS METALS FROM SOLUTIONS USED FOR EXTRACTING SUCH METALS FROM THEIR ORES.,(COLORADO, USA).
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Historic Print (L): Down in a Colorado gold mine--taking out ore, Eagle River Canyon, Colorado, U.S.A.
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Gold - Silver Ore Tumble Stones, 10.2804
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Structural control of the gold deposits of the Cripple Creek district, Teller County, Colorado (Geological Survey)
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Geology and ore deposits of the Breckenridge district, Colorado, (U.S. Geological survey. Professional paper 75)
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