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USA | |
| www.mineralsocal.org/scfm/california/i.htm. |
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 107 Bowen, N.L. (1935), Ferrosilite as a natural mineral: American Journal of Science, 5th. Series: 30: 481 |
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 307 Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 107 Bowen, N.L. (1935), Ferrosilite as a natural mineral: American Journal of Science, 5th. Series: 30: 481 (491 ?) |
| Gunnar Färber - Mineralienliste 3-2017. |
| Amer.J.Sci.(1935) ser. 4, 30, 481-494 |