Limonite from selected localities.
USA | |
| Singewald, Quentin Dreyer; Butler, Bert Sylvenus (1941) Ore deposits in the vicinity of the London fault of Colorado. USGS Bulletin: 911 |
Metal Mining Mining Geology, A.I.M.E. (1937): 432, 440.; Singewald, Quentin Dreyer; Butler, Bert Sylvenus (1941) Ore deposits in the vicinity of the London fault of Colorado. USGS Bulletin: 911 | |
| Minerals of Colorado (1997) E.B. Eckel |