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USA | |
- East Mayacmas Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 89-99 Van Nostrand Reinholt Press: 164. |
- Red Mountain Mining District
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 304. Bradley, W.W., et al (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 39-49 |
- West Mayacmas Mining District
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 304. Crawford, James John (1894), Twelfth report of the State Mineralogist: California Mining Bureau. Report 12: 330 |