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USA | |
- Rico Mining District (Pioneer Mining District)
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
- La Plata Mining District (California Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Dana 6:1090 Dana 7:I:446. |
- La Plata Mining District (California Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Lower San Miguel Mining District
- Placerville Mining District
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Wilmarth, V. R., and Vickers, R. C., 1953, The Robinson and Weatherly uraniferous pyrobitumen deposits near Placerville, San Miguel County, Colorado: U. S. Geol. Survey open-file report, 47 p. |
- Calf Mesa Mining District
| Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin 117. Utah Geological and Mineral Survey |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Snake Creek Mining District (Howland Mining District; White Pine Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Rico Aspen Mine, Newman Hill, Rico Mining District, Rico Mountains, Dolores County, Colorado, USA