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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 Rocks & Minerals Vol.65 No.4 |
| Jackson, 1844. Final Report on The Geology and Mineralogy of NH |
| Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261 |
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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 Morrill. P., 1960, New Hampshire Mines and Mineral Localities. |
| Day, David T. (1888). Mineral Resources of the United States, Calendar Year 1887 (Washington, DC: USGS) |
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| Meyers, T.R., Stewart, G.W. (1956) The Geology of New Hampshire - Part III: Minerals and Mines. New Hampshire Department of Resources and Economic Development. |
| Meyers, T.R., Stewart, G.W. (1956) The Geology of New Hampshire - Part III: Minerals and Mines. New Hampshire Department of Resources and Economic Development. |
| Warren, Grafton Co., New Hampshire, USA |
Holts Ledge, Lyme, Grafton County, New Hampshire, USA