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What the coal miners can do to prevent injury from falls of roof
| Author: | Paul, J. W. |
|---|---|
| Year: | 1930 |
| Document Type: | MAIN |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | C 22.11:6315 |
| Series: | Information circular / U.S. Bureau of Mines ; |
| Report Number: | 6315 |
| Subjects: | Coal mine accidents |
| Mine safety | |
| Coal mines and mining | |
| Link: | https://hdl.handle.net/2027/mdp.39015095084367 |
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