|
USA | |
| Minerals of Colorado (1997) |
| Linda Semenyna P.Geo. (2014) at FLSmidth. Mineral Identification and Analysis MP-1 thru MP-12. Pg. 2, 13. |
| Kadel-Harder, I. M. (2020). Mineralogical and geochemical studies of the Globe Hill, Schist Island, and Wild Horse Extension pits, Cripple Creek gold deposit, Colorado (Masters Thesis, Iowa State University). |
| Carnein, Carl R., Bartos, Paul J. (2005) Famous mineral localities: The Cripple Creek Mining District, Colorado, in March - April 2005. The Mineralogical Record, 36 (2) 143-185 |