Silver from Saguache County, Colorado, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Engineering & Mining Journal (1900) Vol 70 p 673 |
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Eagle Mine, Bonanza Mining District, Saguache County, Colorado, USA