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  1. By: Illinois. Dept. of Natural Resources. - Illinois. Natural History Survey Division - Illinois State Geological Survey.
    Publication info: Springfield, IL, Illinois Dept. of Natural Resources, 1996-
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Illinois  Natural areas  Natural resources  Natural resources surveys  Rock River  Rock River Region (Wis. and Ill.)  Rock River Watershed (Wis. and Ill.)  
  2. By: Illinois. Dept. of Natural Resources. Office of Scientific Research and Analysis. - Critical Trends Assessment Project. - Illinois State Geological Survey. - Illinois. Dept. of Natural Resources.
    Publication info: Springfield, Ill, Illinois Dept. of Natural Resources, 1998-
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Illinois  Illinois River Watershed  Illinois River Watershed (Ill.)  Natural resources conservation areas  Natural resources surveys  
  3. By: Illinois. Dept. of Natural Resources. - Illinois. Office of Realty and Environmental Planning. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: Springfield, Ill, Illinois Dept. of Natural Resources, 2002
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Ecosystem management  Environmental monitoring  Illinois  Natural resources surveys  
  4. 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  
  5. 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