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USA | |
| Dana, James D. (1868) A System of Mineralogy (5th ed.) p.882 |
| "Western Massachusetts Mineral Localities" by Plante, A.R., Valley Geology Press, 1992 |
| (1917) Geology of Massachusetts and Rhode Island. Bulletin Vol. 597. US Geological Survey doi:10.3133/b597 Yale Peabody Museum #3052 |
| "Western Massachusetts Mineral Localites" by Plante, A.R., Valley Geology Press, 1992 |
| Billings, 1944.Spodumene Deposits in the Leominster-Sterling Area. |
| Richmond, Wallace E., Gonyer, F. A. (1938) On pollucite. American Mineralogist, 23 (11) 783-789 |
Clark Ledge pegmatite locality, Chesterfield, Hampshire County, Massachusetts, USA