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USA | |
| Wilson, Wendell E. (2001) Notes From the Editors - Old Yuma mine. The Mineralogical Record, 32 (6) 426-501 |
| Longwell, Chester R. and Edward S. Dana. (1932), Walks & Rides In Central Connecticut and Massachusetts. Tuttle, Morehouse and Taylor, New Haven: 513. |
| 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. |
| LeTourneau, Peter M. and Nicholas G. McDonald. (1985), The Sedimentology, Stratigraphy, and Paleontology of the Lower Jurassic Portland Formation, Hartford Basin, Central Connecticut. State Geological and Natural History Survey of Connecticut Guidebook for Fieldtrips in Connecticut and Adjacent Areas of New York and Rhode Island No. 6: 353-385. |
| Rocks & Min.: 70:403 |
| Specimens collected by Jeremy Zolan in Feb., 2006 |