Branson, B.A. (1961). Recent Gastropoda of Oklahoma. Part II. Distribution, ecology and taxonomy of fresh-water species, with description of Helisoma travertina sp. nov. Oklahoma State University Publication, Arts and Sciences Studies, 58(17): 1-72.
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Branson, B.A.
1961
Recent Gastropoda of Oklahoma. Part II. Distribution, ecology and taxonomy of fresh-water species, with description of Helisoma travertina sp. nov.
Oklahoma State University Publication, Arts and Sciences Studies