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USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| 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. |