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By: Levin, Geoffrey Arthur. - Illinois. Natural History Survey Division - Illinois State Geological Survey. - University of Illinois at Urbana-Champaign. Department of Landscape Architecture. - University of Illinois at Urbana-Champaign. Department of Plant Biology.Edition:Publication info: Champaign, IL, Illinois Natural History Survey, ©2002Volume: no. 23Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects:BHL Collections: