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Milling methods and costs at the Spring Hill Concentrator of the Montana Mines Corporation, Helena, Mont.
| Author: | Grant, L. A. |
|---|---|
| Year: | 1931 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6411 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6411 |
| Subject: | Gold mines and mining--Montana |
| Links: | https://hdl.handle.net/2027/mdp.39015074127567 |
| https://hdl.handle.net/2027/mdp.39015095085729 |
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