University of Illinois Urbana-Champaign

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Showing 181–210 of 647 items
Thumbnail for Physiographic divisions of Illinois
Physiographic divisions of Illinois
Leighton, Morris M.; Ekblaw, George E.; Horberg, Leland

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 Typical rocks and minerals in Illinois
Typical rocks and minerals in Illinois
Ekblaw, George E.; Carroll, Don L.