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  1. The preservation and management of vegetation in ravines in Highland Park, Illinois : a report / prepared by Kenneth R. Robertson and E. B. Himelick of the Illinois Natural History Survey, Urbana, Illinois.
    By: Robertson, Kenneth Ray, - Himelick, E. B. - Highland Park, Ill. - Highland Park, Ill. - Illinois.
    Publication info: Urbana :The Survey,1977.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Botany  Highland Park  Illinois  
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