| Year: | 1985 |
|---|---|
| Document Type: | USBI |
| Issuing Agency: | United States Dept. of the Interior, |
| SUDOC: | I 28.27:9049 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 9049 |
| Subjects: | Electricity in mining |
| Electric currents--Grounding | |
| Mines and mineral resources--Electric equipment | |
| Link: | https://hdl.handle.net/2027/mdp.39015078459271 |