|
USA | |
| USGS PP 75(Ransome,1911) |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. USGS Professional Paper 75 |
| [var. Specularite] Bergendahl, M.H., Koschmann, Albert Herbert (1971) Ore deposits of the Kokomo-Tenmile District, Colorado. Professional Paper 652. US Geological Survey doi:10.3133/pp652 |
| USGS Proffesional Paper 75 |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |