Author: | Powell, James A. |
---|---|
Additional Authors: | Watson, Richard A., |
Year: | 1976 |
Document Type: | BMRA |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.23:8158 |
Series: | Report of investigations - Bureau of Mines ; |
Report Number: | 8158 |
Subjects: | Mine safety |
Mine communication systems | |
Link: | https://hdl.handle.net/2027/mdp.39015078474445 |