Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
6 results returnedSearch results
- Investigation of Twin Buttes copper mines, Pima County, Ariz.
- Copper Giant deposits, Pima County, Ariz.
- Mining methods and practices at the Mineral Hill Copper Mine, Banner Mining Co., Pima County, Ariz.
- Discovery and development of the Pima copper deposit, Pima Mining Co., Pima County, Ariz.
- Open-pit copper mining methods at New Cornelia Branch, Phelps Dodge Corp., Pima County, Ariz.
- Open-pit copper mining and concentrating methods and costs, Silver Bell Unit, American Smelting and Refining Co., Pima County, Ariz.