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USA | |
| 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.: 110, 127-128 |
- Mount Sanhedrin deposits (Impassable Rock deposit)
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 101, 228. |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. O’Brien, J.C. (1953), Mines and mineral resources of Mendocino County, California: California Journal of Mines and Geology (Report 49): 49(4): 364, 391 Van Nostrand Reinholt Press: 412. |
- West Mayacmas Mining District
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 139 Van Nostrand Reinholt Press: 412. |