|
USA | |
| Robert Stoufer collection |
| Gabe Cangelosi Collection Office of Minerals Exploration, Docket OME 6524 (Silver), United States Department of the Interior |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Ransome, Frederick Leslie (1901) A report on the economic geology of the Silverton quadrangle, Colorado. USGS Bull 182 Rocks & Min.:64:140-141 71:168-169 |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Camp Bird Mine, Imogene Basin, Sneffels Mining District, Ouray County, Colorado, USA