| Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261 Foord, Eugene E. and Lichte, Frederick E. (1997): The chemical evolution and paragenesis of uranium minerals from the Ruggles and Palermo granitic pegmatites, New Hampshire, Canadian Mineralogist: 35: 135-144. Frondel, Clifford (1956) Mineral composition of gummite. American Mineralogist, 41 (7-8) 539-568 Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 876, 914. Korzeb, Stanley L. |
Ruggles Mine, Grafton, Grafton County, New Hampshire, USA