Hematite from Leadville, Lake County, Colorado, USA
USA | |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| The Oxidized Zinc Ores of Leadville Colorado, G. F. Loughlin, 1918 |
Rocks & Minerals 81:5 402-409 | |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |