Pilsbry, H. A. (1949). Peruvian land mollusks of the genus Nenia (Clausiliidae). Proceedings of the Academy of Natural Sciences of Philadelphia. 101: 215‑232, pl. 17‑22.
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Pilsbry, H. A.
1949
Peruvian land mollusks of the genus <i>Nenia</i> (Clausiliidae)
Proceedings of the Academy of Natural Sciences of Philadelphia