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USA | |
| Zodac (1941) Rocks & Min.: 16: 164-167. |
| Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner Ralph Lieser of Pappy’s Beryl Shop, East Hampton and Howard Pate of Fluorescent House, Branford, Connecticut. |
| Schooner, Richard. (1955): 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8. |
| 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. Zodac (1941) |
Case Quarries, Portland, Middlesex County, Connecticut, USA