| USA | |
- San Rafael District (San Rafael Swell)
| [Nickel & Nichols, 1991 - "Mineral Reference Manual, p25] | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
| UGMS Bull 117 Minerals and Mineral Localities of Utah |
|