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  1. 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
  2. By: Illinois. Office of Realty and Environmental Planning. - Illinois. Natural History Survey Division - Critical Trends Assessment Program.
    Publication info: Springfield, Ill, Office of Realty and Environmental Planning, 2001
    Holding Institution: University Library, University of Illinois Urbana Champaign
  3. By: Illinois. Division of Energy and Environmental Assessment. - Illinois. Office of Realty and Environmental Planning. - Illinois RiverWatch Network.
    Publication info: Springfield, Ill, Illinois Dept. of Natural Resources, Office of Realty and Environmental Planning, Division of Energy and Environmental Assessment, 1997
    Holding Institution: University Library, University of Illinois Urbana Champaign