University of Illinois Urbana-Champaign

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Showing 4411–4440 of 4,574 items
Thumbnail for Pennsylvanian fusulinidae of Illinois,
Pennsylvanian fusulinidae of Illinois,
Dunbar, Carl O.; Henbest, Lloyd G.; Weller, J. Marvin

Thumbnail for Catalog of Devonian and deeper tests in central Illinois
Catalog of Devonian and deeper tests in central Illinois
Stevenson, D.L.; Keys, John N.; Cluff, Robert M.