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Are new hazards being introduced in coal mines faster than existing hazards are eliminated
| Author: | Harrington, D. |
|---|---|
| Year: | 1940 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7140 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 7140 |
| Subjects: | Coal mine accidents |
| Coal mines and mining--Accidents | |
| Link: | https://hdl.handle.net/2027/mdp.39015078534438 |
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