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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 changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project.
    By: Critical Trends Assessment Project. - Illinois.
    Publication info: Springfield, Ill. :Ill. Dept. of Energy and Natural Resources,1994.
    Contributed by: University of Illinois Urbana Champaign
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  3. Critical trends assessment : the Illinois environment, past, present and future
    By: Illinois.
    Publication info: [Springfield, Ill.?] :Ill. Dept. of Energy and Natural Resources,[1990?]
    Contributed by: University of Illinois Urbana Champaign
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  4. Critical trends assessment Program 2002 report
    By: Illinois. - Critical Trends Assessment Project. - Illinois.
    Publication info: [Illinois] :Illinois Dept. of Energy and Natural Resources, Office of Realty and Environmental Palnning :2002
    Contributed by: University of Illinois Urbana Champaign
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  5. Critical trends assessment Program 2003-04 report
    By: Illinois. - Critical Trends Assessment Project. - Illinois.
    Publication info: [Illinois] :Illinois Dept. of Natural Resources, Office of Realty and Environmental Palnning :Dec. 2004
    Contributed by: University of Illinois Urbana Champaign
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  6. Identification of toxic substances in the upper Illinois River : final report / prepared by River Research Laboratory, Forbes Biological Station, Illinois Natural History Survey ; principal investigators, Richard E. Sparks, Philippe E. Ross ; prepared for Illinois Department of E
    By: Sparks, Richard E. - Ross, Philippe E. - Illinois. - Illinois.
    Publication info: Springfield, Ill. (325 W. Adams St., Springfield 62704-1892) :The Dept.,[1992]
    Contributed by: Lewis & Clark Community College / NGRREC
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