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USA | |
| U.S. Geological Survey Professional Paper 1753 |
| Rocks & Minerals 70:180-187 |
| Holmes, Richard Walker, Kennedy, Marrianna B. (1983) Mines and Minerals of the Great American Rift (Colorado-New Mexico). Van Nostrand Reinhold Co., New York. |
| Rocks & Minerals 82:368-380 |
| Irving, J. D. (1905) Bulletin Vol. 260, Ore Deposits of the Ouray District, Colorado. US Geological Survey p.50-77. doi:10.3133/b260 Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census. U.S. Geological Survey Professional Paper 1753 |
| 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. |
| Holmes, Richard Walker, Kennedy, Marrianna B. (1983) Mines and Minerals of the Great American Rift (Colorado-New Mexico). Van Nostrand Reinhold Co., New York. |
| Ransome, Frederick Leslie (1901) A report on the economic geology of the Silverton quadrangle, Colorado. USGS Bull 182 |
| Rocks & Min. (2009):84:414-425. Rocks & Min.:64:142-143. |