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USA | |
| Dana, James D. (1892), Manual of Mineralogy and Petrography. 12th edition. Wiley, New York. old collection label. |
| Dana, 1844. A System of Mineralogy, 2nd ed., 306 |
| 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. |
Timms Hill, Haddam, Middlesex County, Connecticut, USA