| Author: | Harner, L. S. |
|---|---|
| Year: | 1933 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6739 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6739 |
| Subjects: | Mining engineering--Colorado--Colorado Springs |
| Mines and mineral resources--Colorado--Colorado Springs | |
| Mineral industries--Colorado--Colorado Springs | |
| Mines and mineral resources--Colorado--El Paso County | |
| Link: | https://hdl.handle.net/2027/mdp.39015095086180 |