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 |