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List of permissible mine equipment approved during 1940
| Author: | Gleim, E. J. |
|---|---|
| Year: | 1941 |
| Document Type: | USBI |
| Issuing Agency: | United States Bureau of Mines, |
| SUDOC: | I 28.27:7158 |
| Series: | Information circular / United States. Bureau of Mines ; |
| Report Number: | 7158. |
| Subjects: | Coal mines and mining--United States--Safety measures |
| Mines safety--United States--Equipment and supplies | |
| Link: | https://hdl.handle.net/2027/mdp.39015078533810 |
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