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Open-pit copper mining and concentrating methods and costs, Silver Bell Unit, American Smelting and Refining Co., Pima County, Ariz.
| Author: | Hardwick, W. R. |
|---|---|
| Year: | 1963 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Bureau of Mines, |
| SUDOC: | I 28.27:8153 |
| Series: | Information Circular / Bureau of Mines ; |
| Report Number: | 8153 |
| Subject: | Copper mines and mining--Arizona--Pima County |
| Link: | https://hdl.handle.net/2027/mdp.39015077564402 |
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