Gypsum from selected localities.
USA | |
| U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. Ransome, F. L., Emmons, W. H., & Garrey, G. H. (1909). The geology and ore deposits of Goldfield, Nevada (Professional Paper Vol. 66). US Government Printing Office. |