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USBM IC 6788

Placer mining in the western United States - Part III Dredging and other forms of mechanical handling of gravel, and drift mining

Bibliographic Reference

Gardner, E.D., and Johnson, C.H., 1935, Placer mining in the western United States - Part III Dredging and other forms of mechanical handling of gravel, and drift mining: U.S. Bureau of Mines Information Circular 6788, 83 p.

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Keywords

Dredge; Drift Mine; Mining; Placer

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