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USA | |
| 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. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Rocks and Minerals #270 |
| Rocks & Minerals 79:5 pp316-324 |
| Rockhounding New Mexico(2008) Vaskys, R and Freed, M. Falcon Guides, Globe Pequot Press |
| DeMark, Ramon S. (1989) Micromounting in New Mexico. The Mineralogical Record, 20 (1) 57-64 |
South Overlook locality, Wolf Creek Pass, Mineral County, Colorado, USA