Gold from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
The Mineralogy of The Butte District, Montana; Guilbert and Zeihen 1964 | |
Weed, W.H. (1912) Geology and Ore Deposits of the Butte District, Montana. United States Geological Survey, Professional Paper 74, 262 pages plus plates.; Geology and Ore Deposits of The Butte District, PP74, pg68. Weed, 1912. |
Leonard Mine, Butte Mining District, Silver Bow County, Montana, USA