| Author: | Rad, Parviz F. |
|---|---|
| Additional Authors: | Olson, Richard C. |
| Year: | 1974 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:7881 |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 7881 |
| Subjects: | Mining machinery |
| Boring machinery | |
| Tunneling--Equipment and supplies | |
| Link: | https://hdl.handle.net/2027/mdp.39015078539148 |