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  1. By: Illinois. Dept. of Energy and Natural Resources. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: [Illinois], Illinois Dept. of Energy and Natural Resources, Office of Realty and Environmental Palnning, 2002
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Critical Trends Assessment Project  Ecosystem management  Environmental monitoring  Illinois  Natural resources surveys  
  2. By: Illinois. Dept. of Energy and Natural Resources. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: [Illinois], Illinois Dept. of Natural Resources, Office of Realty and Environmental Palnning, Dec. 2004
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Critical Trends Assessment Project  Ecosystem management  Environmental monitoring  Illinois  Natural resources surveys  
  3. By: Illinois. Dept. of Energy and Natural Resources.
    Publication info: [Springfield, Ill.?], Ill. Dept. of Energy and Natural Resources, [1990?]
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Critical Trends Assessment Project  Environmental impact analysis  Illinois