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By: Karr, James R. - Illinois. Natural History Survey DivisionEdition:Publication info: [Champaign, Ill.], Illinois Natural History Survey, [1986]Volume: no. 5Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: biodegradation Biologie Fließgewässer Illinois Pollution Wassergüte Water Water qualityBHL Collections: