| Author: | Kennedy, D. O. |
|---|---|
| Year: | 1946 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7374 |
| Series: | Information circular / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 7374 |
| Subject: | Coal mines and mining--United States--Safety measures |
| Link: | https://hdl.handle.net/2027/mdp.39015074127864 |