Gold from selected localities.
USA | |
| USGS OFR 1966-87 |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
| U.S. Geological Survey Professional Paper 223 |
Minerals of Colorado (1997) Eckel, E. B. | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
U.S. Geological Survey Professional Paper 223 | |
| USGS Bulletin 1032-C (Drake,1957); U.S. Geological Survey Bulletin 1032-C |
U.S. Geological Survey Professional Paper 223 | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
Minerals of Colorado (1997) E.B. Eckel |