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USA | |
| 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 |
Stone Mine, Iron Hill, Lake County, Colorado, USA