Tryon, G. W. (1866). Monograph of the terrestrial Mollusca of the United States. American Journal of Conchology. 2(3): 218-279, pls 1-4 [1 July]; 2(4): 306-327, pls 5-6 [6 October].
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Tryon, G. W.
1866
Monograph of the terrestrial Mollusca of the United States.