| Author: | Parker, Dorsey Julian, |
|---|---|
| Year: | 1933 |
| Document Type: | USBI |
| Issuing Agency: | United States Bureau of Mines, |
| SUDOC: | I28.27:6747 |
| Series: | Information Circular / Bureau of Mines ; |
| Report Number: | 6747 |
| Subject: | Electricity in mining |
| Link: | https://hdl.handle.net/2027/mdp.39015077572181 |