Silver-bearing Galena from Hinsdale County, Colorado, USA
USA | |
| Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census. |
| IRVING, J.D., AND BANCROFT, HOWLAND (1911), GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULLETIN 478: 111-116. |
| Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census. |