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USA | |
| Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261 |
| Rocks & Minerals: 80: 252. |
| American Mineralogist (1979): 64: 466. Moore, Paul B. (1965) Hühnerkobelite crystals from the Palermo No. 1 Pegmatite, North Groton, New Hampshire. American Mineralogist, 50 (5-6) 713-717 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: 686, 977 Frondel, Clifford (1949) Wolfeite, xanthoxenite and whitlockite from the Palermo Mine, New Hampshire. American Mineralogist, 34 (9-10) 692-705 |
Fletcher Mine, Groton, Grafton County, New Hampshire, USA