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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 |
| Nicolay & Stone (1967), Rocks & Minerals: A Guide For Collectors of the Eastern US, p.88 |
| 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. Rocks & Min.: 17:136-139. |
| Warren, Grafton Co., New Hampshire, USA |
| Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261 The geology of the Ammonoosuc mining district By Charles Henry Hitchcock |
Ore Hill Mine, Warren, Grafton County, New Hampshire, USA