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Three potential longwall mining methods for thick coal seams in the western United States
| Author: | Oitto, Richard H. |
|---|---|
| Year: | 1979 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines : |
| SUDOC: | I 28.27:8792 |
| Series: | Information circular - Bureau of Mines ; |
| Report Number: | 8792 |
| Subjects: | Coal mines and mining--West (U.S.) |
| Mining engineering | |
| Link: | https://hdl.handle.net/2027/mdp.39015078461111 |
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