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USA | |
| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. [Canadian Mineralogist(1978) 16, 651-659 |
| Bastin, E. S. (1922). Bonanza ores of the Comstock lode, Virginia City, Nevada. US Government Printing Office. |
| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |