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  1. Soybean spiders : species composition, population densities and vertical distribution / by Charles D. LeSar and John D. Unzicker.
    By: LeSar, Charles D. - Unzicker, John D.,
    Publication info: Urbana :State of Illinois, Dept. of Registration and Education, Illinois Natural History Survey Division,1978.
    Contributed by: University of Illinois Urbana Champaign
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