Drilling hole 3,000 ft. under ground (Silver Lake Mine, near Silverton, Colo.) Back
Part of: Drilling hole 3,000 ft. Under Ground (Silver Lake Mine, near Silverton, Colo.) (2 objects)
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Drilling hole 3,000 ft. under ground (Silver Lake Mine, near Silverton, Colo.) Front
Drilling hole 3,000 ft. under ground (Silver Lake Mine, near Silverton, Colo.) Back