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USA | |
| White, John Sampson (1973) What's New in Minerals?. The Mineralogical Record, 4 (6) 275-294 |
| Potter, Russell M., Rossman, George R (1979) The tetravalent manganese oxides: identification, hydration, and structural relationships by infrared spectroscopy. American Mineralogist, 64 (11-12) 1199-1218 |
- George Canyon (George F. Canyon)
| Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc. Mitchell, R.S. and Corey, A. (1973) Braunite and sursassite from Los Angeles County, California. Mineralogical Record: 4: 290 Van Nostrand Reinholt Press: 164, 485. |