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USA | |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. Plumlee, Geoffrey S, Whitehouse-Veaux, Pamela Heald (1994) Mineralogy, paragenesis, and mineral zoning of the Bulldog Mountain vein system, Creede district, Colorado. Economic Geology, 89 (8) 1883-1905 Plumlee, Geoffrey S., Whitehouse-Veaux, Pamela Heald (1994) Mineralogy, paragenesis, and mineral zoning of the Bulldog Mountain vein system, Creede District, Colorado. Economic Geology, 89 (8). 1883-1905 doi:10.2113/gsecongeo.89.8.1883 December 1994 v. 89 no. 8 |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. Foley, Nora K., Caddey, Stanton W., Byington, Craig B., Vardiman, David M. (1993) Mineralogy, mineral chemistry, and paragenesis of gold, silver, and base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado. Professional Paper 1537. US Geological Survey doi:10.3133/pp1537 Foley, N. K. Caddey, S. W. Byington, C. B. |
| Tom Rosemeyer (1993) Through the 'Scope: Brookite, Anatase & Rutile from the Silver Link Mine Ouray County, Colorado, Rocks & Minerals, 68:5, pp. 327-330 |