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  1. Aquatic plants of Illinois; an illustrated manual including species submersed, floating, and some of shallow water and muddy shores
    By: Winterringer, Glen Spelman, - Lopinot, Alvin C.
    Publication info: [Springfield]Dept. of Registration & Education, Illinois State Museum Division,1966.
    Contributed by: University of Illinois Urbana Champaign
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  2. Some plant galls of Illinois / by Glen S. Winterringer.
    By: Winterringer, Glen Spelman,
    Publication info: Springfield, Ill. :Dept. of Registration and Education,1961.
    Contributed by: University of Illinois Urbana Champaign
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  3. Wild orchids of Illinois
    By: Winterringer, Glen Spelman,
    Publication info: [Springfield]1967.
    Contributed by: University of Illinois Urbana Champaign
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