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Hubricht, Leslie. 1985. The Distributions of Native Land Mollusks of the Eastern United States, pg 8, 69

Burtch, John. 1962. How To Know the Eastern Land Snails, pg 46-47

Allaby, Michael. 1999. A Dictionary of Zoology

Miller, Barry B. 1970. The Sandhal Molluscan Fauna (Illinoian) From McPherson County, Kansas