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Sand filling in stopes
| Author: | Gardner, E. D. |
|---|---|
| Year: | 1921 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:2208 |
| Series: | Report of investigations / United States. Bureau of Mines ; |
| Report Number: | 2208 |
| Subjects: | Copper mines and mining--Arizona |
| Mines and mineral resources--Arizona | |
| Link: | https://hdl.handle.net/2027/mdp.39015086555375 |
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