|
USA | |
| Robert Stoufer collection |
| U.S. Geological Survey Professional Paper 1753 |
| 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. Tom Rosemeyer (1993) Through the 'Scope: Brookite, Anatase & Rutile from the Silver Link Mine Ouray County, Colorado, Rocks & Minerals, 68:5, pp. 327-330, Published online July 8, 2010: https://www.tandfonline.com/doi/abs/10.1080/00357529.1993.9926563 |