Zippeite from Idaho Springs Mining District (Virginia Mining District), Clear Creek County, Colorado, USA
USA | |
| Sims, P.K. (1963) Geology of uranium and associated ore deposits, central part of the Front Range mineral belt, Colorado. Professional Paper 371. US Geological Survey doi:10.3133/pp371 USGS OFR 66-87(Moench,1966) |
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |