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  1. Illinois River Bluffs area assessment /
    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  
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