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USA | |
| Cahoon, James C. (1985). Massachusetts: A Classic Swiss Alpine Cleft Mineral Region (Boston Mineralogical Symposium program book, May 1985) |
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| Paul Gilmore collection |
| BMC News, Sept. 2005 |
| P Cristofono collection, 2007 |
| Palache & Fraprie, Proc.Am.Acad.Arts.Sci. 38:383-393. |
| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
| Richmond, W. E. Jr. (1936): Paragenesis of the Minerals From Blueberry Mountain, Woburn, Massachusetts (American Mineralogist 22:290). |
PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA