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  1. Chronology and molluscan paleontology of two post-Woodfordian bogs in northeastern Illinois /
    By: Leonard, A. Byron
    Publication info: Urbana :Illinois State Geological Survey,1974.
    Contributed by: University of Illinois Urbana Champaign
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  2. Illinoian and Kansan molluscan faunas of Illinois /
    By: Leonard, A. Byron - Frye, John Chapman, - Johnson, W. Hilton - Illinois State Geological Survey.
    Publication info: Urbana, Ill. :Illinois State Geological Survey,1971.
    Contributed by: University of Illinois Urbana Champaign
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  3. Types of late Cenozoic gastropods in the Frank Collins Baker Collection, Illinois State Geological Survey.
    By: Leonard, A. Byron
    Publication info: Urbana,1957.
    Contributed by: University of Illinois Urbana Champaign
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  4. Wisconsinan molluscan faunas of the Illinois Valley region /
    By: Leonard, A. Byron - Frye, John Chapman,
    Publication info: Urbana :Illinois State Geological Survey,1960.
    Contributed by: University of Illinois Urbana Champaign
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