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Milling method and cost at the conglomerate mill of the Calumet & Hecla Consolidated Copper Co
| Author: | Benedict, C. Harry, |
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| Year: | 1930 |
| Document Type: | MAIN |
| Issuing Agency: | Dept. of Commerce, U.S. Bureau of Mines, |
| SUDOC: | C 22.11:6364 |
| Series: | United States. Bureau of Mines. Information circular |
| Report Number: | 6364 |
| Subject: | Copper mines and mining--Michigan |
| Link: | https://hdl.handle.net/2027/mdp.39015095084680 |
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