K Feldspar from Colorado Plateau, USA
USA | |
| Olson, Jerry C. & Hinrichs (1960), USGS Bull. 1082-D, Beryl-bearing pegmatites in the Ruby Mts & other areas in NV & NW AZ: 192. |
| [var. Adularia] USGS Open-File Report 82-888 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |