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USA | |
| Dana, James D. (1857): Fourth Supplement to Dana's Mineralogy. American Journal of Science: series 2, 24: 124. Shepard, Charles U. (1851): On new localities of American minerals. American Association for the Advancement of Science Proceedings 4th Meeting: 319. (see also American Journal of Science (1851): series 2, 12: 220). |
| Weber, Marcelle H., Sullivan, Earle C. (1995) Connecticut Mineral Locality Index. Rocks & Minerals, 70 (6) 396-409 doi:10.1080/00357529.1995.11761569 Januzzi, Ronald. E. (1994) Mineral Data Book - Western Connecticut and Environs. Mineralogical Press, Danbury, Connecticut, USA. Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA. |
| Specimen in the collection of Andrew Kruegel identified by SEM-EDS |
| Weber, Marcelle H., Sullivan, Earle C. (1995) Connecticut Mineral Locality Index. Rocks & Minerals, 70 (6) 396-409 doi:10.1080/00357529.1995.11761569 |
| [var. Thorogummite] Collections of Fred E Davis, Harold Moritz |
| [var. Thorogummite] Specimen in collection of Andrew Kruegel |
| Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA. Januzzi, 1966, 1989 |
Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA