| Author: | Douglas, S. J. |
|---|---|
| Year: | 1960 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7995 |
| Series: | Information Circular / Bureau of Mines ; |
| Report Number: | 7995 |
| Subjects: | Coal mines and mining--Equipment and supplies |
| Electric cables--Testing | |
| Link: | https://hdl.handle.net/2027/mdp.39015077562356 |