Pilsbry, H. A. (1948). Inland mollusks of Northern Mexico: I. The genera Humboldtiana, Sonorella, Oreohelix and Ashmunella. Proceedings of the Academy of Natural Sciences of Philadelphia. 100: 185-203.
443861
Pilsbry, H. A.
1948
Inland mollusks of Northern Mexico: I. The genera Humboldtiana, Sonorella, Oreohelix and Ashmunella
Proceedings of the Academy of Natural Sciences of Philadelphia