References

Baker, F.C.  1939. Fieldbook of Illionis Land Snails. Ilinois Natural History Survey Manual 2:5-11; 93-110.

Franzen, D.S.  1947. Living and Fossil Pupillidae (Gastropoda) of the Sanborn Area, Northwestern Kansas. Transactions of the Kansas Academy of Science 49:407-419.

Leonard, B.A.  1952. Illinoian and Wisconsin Molluscan Faunas in Kansas. University of Kansas Paleontological Contributions: Molusca 4:22-45.

Metcalf, A.L. 1962. Gastropods of Cowley County, Kansas. Transactions of the Kansas Academy of Science 65:275-289.

Miller, B.B.  1964. Additional Mollusks from the Late Pliocene Bender Local Fauna, Meade County, Kansas. Journal of Paleontology 38:113-117.

Myers, P. R. et al  2008. The Animal Diversity Web (online). http://animaldiversity.org.

Pilsbury, H. A.  1948. Land Mollusca of North America (North of Mexico). The Academy of Natural Sciences of Philadelphia  2:883-884.