| Author: | Belser, Carl. |
|---|---|
| Year: | 1956 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7731 |
| Series: | Information circular / United States. Bureau of Mines ; |
| Report Number: | 7731 |
| Subjects: | Mines and mineral resources--Colorado |
| Tungsten | |
| Link: | https://hdl.handle.net/2027/mdp.39015078459404 |