Search U.S. government technical reports digitized or harvested by TRAIL.
Sullivan copper mine, Cochise County, Arizona
Zonia Copper Mine, Yavapal County, Ariz.
Mining and milling methods at San Xavier mine, the Eagle-Picher Mining & Smelting Co., Pima County, Ariz.
Mining investigations of manganese deposits in the Maggie Canyon area, Artillery Mountains region, Mohave County, Ariz.