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By: United States. Bureau of Land Management. Portland Service Center.Edition:Publication info: Portland, Or, U.S. Department of the Interior, Bureau of Land Management, Portland Service Center, 1970Volume: no.70Series:Holding Institution: Bureau of Land ManagementSubjects: Analysis Bureau of Land Management Copper ores Igneous rocks Mines and mineral resources Porphyry Records and correspondence Southwestern States United StatesBHL Collections: