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Pilsbry, H. A.; Black, M. (1930). Cerions of Andros, Bahamas. Proceedings of the Academy of Natural Sciences of Philadelphia. 82: 289-296, text-figures 1-3, pl. 21.
Pilsbry, H. A.; Black, M. (1930). Cerions of Andros, Bahamas. Proceedings of the Academy of Natural Sciences of Philadelphia. 82: 289-296, text-figures 1-3, pl. 21.