University of Illinois Urbana-Champaign

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Showing 5431–5460 of 13,159 items
Thumbnail for Hydrogeologic and geochemical studies of selected natural radioisotopes and barium in groundwater in Illinois
Hydrogeologic and geochemical studies of selected natural radioisotopes and barium in groundwater in Illinois
Gilkeson, Robert H.; Cartwright, Keros; Cowart, James B.; Holtzman, Richard B.

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