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Pilsbry, H. A. (1956). Inland Mollusca of Northern Mexico. III. Polygyridae and Potadominae. Proceedings of the Academy of Natural Sciences of Philadelphia. 108: 19-40.
Pilsbry, H. A. (1956). Inland Mollusca of Northern Mexico. III. Polygyridae and Potadominae. Proceedings of the Academy of Natural Sciences of Philadelphia. 108: 19-40.
