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| Cook, 1974 |
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| Sawtelle, Ithamar B. (1878). History of the Town of Townsend (Fitchburg, MA: Blanchard & Brown). |
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| Rocks & Min.: 21:754. |
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| Houghton, William Addison (1895). History of the Town of Berlin, Worcester County, Mass., from 1784-to 1895. (Worcester, MA: F. S. Blanchard & Co.), p. 47. |
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| (1917) Geology of Massachusetts and Rhode Island. Bulletin Vol. 597. US Geological Survey doi:10.3133/b597 |
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| Perry, J.H., Emerson, B.K. (1903) The Geology of Worcester, Massachusetts. Worcester Natural History Society, 166 pages. |
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| Jackson, 1844. Final Report on The Geology and Mineralogy of NH |
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| Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261
Robinson, S. 1825: A Catalogue of American Minerals, with Their Localities |
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| Cochrane, Warren and Wood, George K. (1895): History of Francstown, N.H. |
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| Hayward, William Willis (1889). The history of Hancock, New Hampshire, 1764-1889 (Lowell, MA: Vox Populi Press). |
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| P Cristofono collection |
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| Cogswell, 1880. History of the Town of Henniker |
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| D. Rumble & C.P. Chamberlain: Graphite Vein Deposits of New Hampshire. In: New England Intercollegiate Geological Conference 80th Annual Meeting Guidebook for Field Trips (1988) 241-255. |
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| Dana, I. F. (1820). Localities of Minerals (American Journal of Science 2:241) |
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| P Cristofono collection, 2008 |
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| P. Cristofono collection |
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| Rocks & Min. 39:355 (1964)
Rocks & Minerals 80:4 pp234-241 |
Ledge Road, Windham, Rockingham County, New Hampshire, USA