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USA | |
| King's Mark Environmental Review Team Report (1984) Old Quarry Nature Center Danbury, CT., King's Mark Resource Conservation & Development area, Warren, Connecticut. |
| Moritz, Harold (n.d.) Personal Communication. |
| Crowley, William Patrick, Bedrock Geology of the Long Hill Quadrangle 1963-1965, Quadrangle Report of the State Geological and Natural History Survey of Connecticut. |
| Weber, Marcelle H., Sullivan, Earle C. (1995) Connecticut Mineral Locality Index. Rocks & Minerals, 70 (6) 396-409 doi:10.1080/00357529.1995.11761569 |
| Lundgren, Lawrence Jr. (1979) The Bedrock Geology of the Haddam Quadrangle. Quadrangle Report 37.. State Geological and Natural History Survey of Connecticut |