| Author: | Unger, Richard L. |
|---|---|
| Year: | 1989 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:9246 |
| Series: | Report of investigations / United States. Bureau of Mines ; |
| Report Number: | 9246 |
| Subjects: | Coal mines and mining--Equipment and supplies--Design and construction |
| Mine railroads--Track maintenance vehicles--Design and construction | |
| Link: | https://hdl.handle.net/2027/mdp.39015078477125 |