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Comprehensive plan for the Illinois Nature Preserves System.
Publication Info: Rockford, Ill. :Illinois Nature Preserves Commission,1972-1973.
Contributed By: University of Illinois Urbana Champaign
Technical report : Illinois natural areas inventory / by the Department of Landscape Architecture, Univeristy of Illinois, Urbana-Champaign, and the Natural Land Institute, Rockford, Illinois.
Publication Info: Urbana :Dept. of Landscape Architecture, University of Illinois and Natural Land Institute,1978.
Contributed By: University of Illinois Urbana Champaign