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USA | |
| Garrels, R.M., Larsen, E.S. (1959) Geochemistry and mineralogy of the Colorado Plateau uranium ores. United States Geological Survey, Professional Paper 320: 236p. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Paradox Valley, Uravan Mining District, Montrose County, Colorado, USA