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By: Peppers, Russel A. (Russel Allen), - Illinois State Geological Survey.Edition:Publication info: Urbana, Ill, Illinois State Geological Survey, 1964Volume: Illinois State Geological Survey Bulletin No. 90Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects:BHL Collections:
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By: Peppers, Russel A. (Russel Allen), - Damberger, H. H.,Edition:Publication info: Urbana, Illinois State Geological Survey, 1969Volume: Information circular / Illinois State Geological SSeries:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects:BHL Collections:
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By: Pfefferkorn, Hermann W. - Peppers, Russel A. (Russel Allen), - Phillips, Tom Lee,Edition:Publication info: Urbana, Illinois State Geological Survey, 1971Volume: Circular no.463Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects:BHL Collections: