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By: Phillips, Tom Lee, - Avcin, Matthew J., - Berggren, Dwain,Edition:Publication info: Urbana, Illinois State Geological Survey, 1976Volume: Illinois State Geological Survey Education SeriesSeries:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Coal balls Illinois Basin Paleobotany PennsylvanianBHL Collections:
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By: Shaw, Thomas H. (Thomas Howard) - Sargent, Michael L. (Michael Leroy) - Illinois State Geological Survey.Edition:Publication info: Champaign, Ill, Illinois State Geological Survey, 1989Volume: ISGS IL Petroleum Series No. 132Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Borings Catalogs Geology Geology, Stratigraphic Geophysical methods Illinois Basin Natural gas Paleozoic ProspectingBHL Collections:
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By: Peppers, Russel Allen, - Harvey, Richard D. (Richard David), - Illinois State Geological Survey.Edition:Publication info: Champaign, Ill, Dept. of Natural Resources, Illinois State Geological Survey, 1997Volume: Information circular / Illinois State Geological SSeries:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Algae, Fossil Analysis Coal Illinois Basin Paleobotany Spores (Botany), Fossil TorbaniteBHL Collections: