| Author: | Ilsley, L. C. |
|---|---|
| Additional Authors: | Gleim, E. J., Craven, F. |
| Year: | 1933 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6690 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6690 |
| Subjects: | Coal mines and mining |
| Coal-mining machinery--Safety | |
| Link: | https://hdl.handle.net/2027/mdp.39015077565086 |