Pilsbry, H. A. (1940). Land Mollusca of North America (north of Mexico). Volume I Part 2. The Academy of Natural Sciences of Philadelphia Monographs. 3: i-vii, 575-994, i-ix. Philadelphia [1 August].
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Pilsbry, H. A.
1940
Land Mollusca of North America (north of Mexico). Volume I Part 2
The Academy of Natural Sciences of Philadelphia Monographs