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  1. Chester ostracodes of Illinois,
    By: Cooper, Chalmer L.
    Publication info: Urbana, Ill.,1941.
    Contributed by: University of Illinois Urbana Champaign
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  2. Occurrence and stratigraphic distribution of Paleozoic ostracodes,
    By: Cooper, Chalmer L.
    Publication info: Urbana, Illinois,1942.
    Contributed by: University of Illinois Urbana Champaign
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  3. Smaller Foraminifera from the Porters Creek formation (Paleocene) of Illinois,
    By: Cooper, Chalmer L.
    Publication info: Urbana, Illinois,1944.
    Contributed by: University of Illinois Urbana Champaign
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  4. Upper Kinkaid (Mississippian) microfauna from Johnson County, Illinois,
    By: Cooper, Chalmer L.
    Publication info: Urbana,1947.
    Contributed by: University of Illinois Urbana Champaign
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