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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. |
| Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston |
| Hitchcock, Edward. (1823). A Sketch of the Geology, Mineralogy, and Scenery of the Regions Contiguous to the River Connecticut. American Journal of Science, s. 1, vol. 6, no. 2, p. 235. |