Pyrargyrite from
USA | |
| Rocks & Min.: 14:72. |
| Murdoch, Joseph, Webb, Robert W. (1966) Minerals of California, Centennial Volume (1866-1966) - California Division Mines and Geology, Bulletin 189. p.1-559. Engineering and Mining Jour. (Engineering & Mining Journal) (1879), Letter to Mining and Scientific Press, June 21, 1879: 28: 8 (July, 1879) |