-
By: Schuberth, Christopher J. - Cashatt, Everett D. - Illinois State Museum.Edition:Publication info: Springfield, Ill, Illinois State Museum, Education Section, [1985]Volume:Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Biotic communities Cave-in-Rock Region Fluorspar Geology Guidebooks IllinoisBHL Collections: