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Baker, H. B. (1931). Neartic Vitreine land snails. Proceedings of the Academy of Natural Sciences of Philadelphia. 83: 85-117, pls. 13-20.
Baker, H. B. (1931). Neartic Vitreine land snails. Proceedings of the Academy of Natural Sciences of Philadelphia. 83: 85-117, pls. 13-20.
