Pilsbry, H. A. (1953). Inland Mollusca of northern Mexico. II. Urocoptidae, Pupillidae, Strobilopsidae, Valloniidae and Cionellidae. Proceedings of the Academy of Natural Sciences of Philadelphia. 105: 133-167, plates 3-10.
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Pilsbry, H. A.
1953
Inland Mollusca of northern Mexico. II. Urocoptidae, Pupillidae, Strobilopsidae, Valloniidae and Cionellidae.
Proceedings of the Academy of Natural Sciences of Philadelphia