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| King's Mark Environmental Review Team Report (1984) Old Quarry Nature Center Danbury, CT., King's Mark Resource Conservation & Development area, Warren, Connecticut. |
| Moore, Fred H. (1935): Marbles and Limestones of Connecticut. State Geological and Natural History Survey Bulletin 56, Hartford: 24. |
| Moore, Fred H. (1935): Marbles and Limestones of Connecticut. State Geological and Natural History Survey Bulletin 56, Hartford: 24. |
| Moore, Fred H. (1935): Marbles and Limestones of Connecticut. State Geological and Natural History Survey Bulletin 56, Hartford: 24. |