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Roof movement study of mechanized retreating longwall operation, Lancashire no. 15 mine, Bakerton, Cambria County, Pa.
| Author: | Barry, A. J. |
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| Additional Authors: | Wojciechowski, J. J. |
| Year: | 1954 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:5028 |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 5028 |
| Subjects: | Longwall mining |
| Mine roof control | |
| Link: | https://hdl.handle.net/2027/mdp.39015078478966 |
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