| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. Kile, Daniel E., Tribbey, E. Gene, Kile, Dianne L. (1994) Minerals from the Topeka-Kentucky Giant and Indiana Veins, Ouray County, Colorado. The Mineralogical Record, 25 (5) 371-376 |