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USA | |
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 195 Kunz, George F. (1905) Gems, Jewelers' Materials, and Ornamental Stones of California. Bulletin 37 (2nd ed.) California State Mining Bureau |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Tule Mountain (Mount Tule; Tulley Mountain)
| Fisher, Jesse (2002) Gem and Rare-Element Pegmatites of Southern California. The Mineralogical Record, 33 (5) 363-407 |
| Fisher, Jesse (2002) Gem and Rare-Element Pegmatites of Southern California. The Mineralogical Record, 33 (5) 363-407 Russ Rizzo Collection |
Pack Rat Mine, Tule Mountain, Jacumba, San Diego County, California, USA