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| B. Wilken collection. |
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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 |
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| Boudette, Eugene L. (2005). Gold in New Hampshire (NH Dept. of Environmental Services, Environmental Fact Sheet CO-GEO-1). |
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| Boudette, Eugene L. (2005). Gold in New Hampshire (NH Dept. of Environmental Services, Environmental Fact Sheet CO-GEO-1). |
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| King, Van (n.d.) Personal communcation. |
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| The geology of the Ammonoosuc mining district By Charles Henry Hitchcock |
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| Boudette, Eugene L. (2005). Gold in New Hampshire (NH Dept. of Environmental Services, Environmental Fact Sheet CO-GEO-1). |
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| Musgrove, Richard Watson (1904): History of the Town of Bristol, Grafton County, New Hampshire. |
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| Hitchcock, Charles Henry (1905). The Geology of Littleton, New Hampshire (Cambridge MA: University Press). |
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| The geology of the Ammonoosuc mining district By Charles Henry Hitchcock |
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| The geology of the Ammonoosuc mining district By Charles Henry Hitchcock |
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| The geology of the Ammonoosuc mining district By Charles Henry Hitchcock |
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| The geology of the Ammonoosuc mining district By Charles Henry Hitchcock |
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| Warren, Grafton Co., New Hampshire, USA |
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- Great Bay National Wildlife Refuge
| [var. Electrum] Nora K. Foley, Robert A. Ayuso, Joseph D. Ayotte, Denise L. Montgomery, and Gilpin R. Robinson, Jr. (2006): Geological Assessment of Cores from the Great Bay National Wildlife Refuge, New Hampshire (USGS Scientific Investigations Report 2006-5203). |
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| Johannes Swarts collection |
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Ammonoosuc Mining District, Grafton County, New Hampshire, USA