University of Illinois Urbana-Champaign

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Showing 1–30 of 125 items
Thumbnail for Classification of the Pennsylvanian rocks of Illinois as of 1956,
Classification of the Pennsylvanian rocks of Illinois as of 1956,
Wanless, Harold R. (Harold Rollin), 1899-1970.; Siever, Raymond

Thumbnail for Prairie Research Institute 2011 Report
Prairie Research Institute 2011 Report
Prairie Research Institute