Author: | Ambrose, Dean H. |
---|---|
Year: | 1985 |
Document Type: | USBI |
Issuing Agency: | United States Dept. of the Interior, |
SUDOC: | I 28.27: 9050 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 9050 |
Subjects: | Electricity in mining |
Coal mines and mining--Electric equipment | |
Link: | https://hdl.handle.net/2027/mdp.39015078459263 |