| Author: | Denny, E. H. |
|---|---|
| Year: | 1928 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6064 |
| Series: | Information circular / United States Department of Commerce, Bureau of Mines ; |
| Report Number: | 6064 |
| Subject: | Mine safety |
| Link: | https://hdl.handle.net/2027/mdp.39015078516641 |