| 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. Sears, J. H.(1905) The Physical Geography, Geology, Mineralogy and Paleontology of Essex County. Yale Peabody Museum no. 161 and 1674 |