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USA | |
| Rocks & Min.: 70:379 |
| Moritz, Harold (n.d.) Personal Communication. |
| Moritz, Harold (n.d.) Personal Communication. |
| King, Van (n.d.) Personal communcation. |
| Cameron et al (1954): USGS Prof Paper 255 |
| King, Van (n.d.) Personal communcation. |
| King, Van (n.d.) Personal communcation. |
| Bastin, Edson S. (1910): Economic Geology of the Feldspar Deposits of the United States. United States Geological Survey Bulletin 420, Government Printing Office. |
| P Cristofono collection |
| Albini, A.J. and Moritz, H. (2013), Collecting samarskite at the historic Spinelli prospect, Glastonbury, Hartford County, Connecticut. The 40th Rochester Mineralogical Symposium, Contributed Papers in Specimen Mineralogy, 8. |
Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA