Copper Stain from Idaho, USA
USA | |
| USGS Bull 2064X |
| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
| Copper Handbook 1911 |
USA | |
| USGS Bull 2064X |
| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
| Copper Handbook 1911 |