Ramsdellite from Montana, USA
USA | |
| Geology and Ore Deposits of the Philipsburg District, Granite Co., Montana William C. Prinz, 1967 |
| Jenkins, Robert E. II, Lorengo, Jerry A. (2002) Butte, Montana: Minerals, Mines and History. The Mineralogical Record, 33 (1) 5-69 The mineralogy of the butte district, Montana By John M. Guilbert and Lester G. Zeihen |