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  1. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project.
    By: Illinois. - Nature of Illinois Foundation.
    Publication info: [Springfield, Ill.?] :Ill. Dept. of Energy and Natural Resources, the Nature of Ill. Foundation,1994.
    Contributed by: University of Illinois Urbana Champaign
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  2. The Nature of Illinois.
    By: Nature of Illinois Foundation. - Society for the Illinois Scientific Surveys.
    Publication info: [Springfield, Ill.] :Society for the Illinois Scientific Surveys,1986-
    Contributed by: University of Illinois Urbana Champaign
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