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Mining methods and costs at the Braden Copper Co.'s mines, Sewell, Chile
| Author: | Webb, J. S. |
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| Additional Authors: | Skinner, T. W. |
| Year: | 1932 |
| Document Type: | MAIN |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6565 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6565 |
| Subject: | Copper mines and mining--Chile |
| Link: | https://hdl.handle.net/2027/mdp.39015095085521 |
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