|
USA | |
- Lake City Mining District
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Dana 6:1090. |
- Park Mining District (Whitecross Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- La Plata Mining District (California Mining District)
| Cook, Robert B. (2010) Connoisseur's Choice: Calaverite, Cripple Creek, Colorado. Rocks & Minerals, 85 (5) 426-433 doi:10.1080/00357529.2010.494151 R & K Metals and Mining - Bob Ross - Part owner of the Bessie G |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Crook, Wilson W. and Oswald, Stanley G. (1979) Calaverite from the Idarado Mine. Friends of Mineralogy Colorado Chapter Newsletter: 2(1). |
| U.S. Geological Survey Professional Paper 1753 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Rocks & Min.: 63: 366-384. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Bessie G Mine, La Plata Mining District, La Plata County, Colorado, USA