Search U.S. government technical reports digitized or harvested by TRAIL.
Concentrator methods and costs at the Hayden Plant of the Nevada Consolidated Copper Co., Arizona
Mining methods at the Old Dominion Mine, Globe, Ariz.
Mining methods and costs at the New Cornelia Branch, Phelps Dodge Corporation, Ajo, Ariz.
Design, equipment, and construction costs of Davis-Dunkirk concentrator, Prescott, Ariz.