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What the superintendent of a coal mine might do to prevent injury from falls of roof
| Author: | Paul, J. W. |
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| Additional Authors: | Paul, J. W. |
| Year: | 1930 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6345 |
| Subjects: | Mine safety |
| Coal mine accidents | |
| Link: | https://hdl.handle.net/2027/mdp.39015077576067 |
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