University of Illinois Urbana-Champaign

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Showing 1–30 of 679 items
Thumbnail for Classification of the Pennsylvanian strata of Illinois
Classification of the Pennsylvanian strata of Illinois
Kosanke, Robert M.; Simon, J.A.; Wanless, H.R.; Willman, H.B.

Thumbnail for Bibliography and index of Illinois geology through 1965
Bibliography and index of Illinois geology through 1965
William, H.B.; Simon, Jack A.; Lynch, Betty M.; Langenheim, Virginia A.

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 Geology of the Waltersburg Quadrangle, Pope County, Illinois
Geology of the Waltersburg Quadrangle, Pope County, Illinois
Weibel, C. Pius; Nelson, W. John; Oliver, Lynne B.; Esling, Steven P.