Pilsbry, H. A. & Ferriss, J. H. (1915). Mollusca of the southwestern states, VII: The Dragoon, Mule, Santa Rita, Baboquivari and Tucson Ranges, Arizona. Proceedings of the Academy of Natural Sciences of Philadelphia. 67 (2): 363-418, plates 8-15.
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Pilsbry, H. A. & Ferriss, J. H.
1915
Mollusca of the southwestern states, VII: The Dragoon, Mule, Santa Rita, Baboquivari and Tucson Ranges, Arizona.
Proceedings of the Academy of Natural Sciences of Philadelphia