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USA | |
| Barton, W. & C. E. Goldsmith (1968) New England Beryllium investigations. US Bureau Mines RI 7070 |
| [var. Carbonate-rich Apatite] King, Van (n.d.) Personal communcation. |
| Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| Dale, T. Nelson (1909). Supplementary Notes on the Granites of New Hampshire (in Contributions to Economic Geology, Part I, USGS Bulletin 430, 1910). |
| Dale, T. Nelson (1909). Supplementary Notes on the Granites of New Hampshire (in Contributions to Economic Geology, Part I, USGS Bulletin 430, 1910). |
| Dale, T. Nelson (1909). Supplementary Notes on the Granites of New Hampshire (in Contributions to Economic Geology, Part I, USGS Bulletin 430, 1910). |
| Dale, T. Nelson (1909). Supplementary Notes on the Granites of New Hampshire (in Contributions to Economic Geology, Part I, USGS Bulletin 430, 1910). |
| Dale, T. Nelson (1909). Supplementary Notes on the Granites of New Hampshire (in Contributions to Economic Geology, Part I, USGS Bulletin 430, 1910). |
| Maggie Wilson |
Chickering Mine, Walpole, Cheshire County, New Hampshire, USA