University of Illinois Urbana-Champaign

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Showing 7141–7170 of 8,834 items
Thumbnail for Rock River Area Assessment
Rock River Area Assessment
Illinois Department of Natural Resources

Thumbnail for Economic and Geologic Papers
Economic and Geologic Papers
Nebel, M.L.; Savage, Thomas Edmund; Culver, Harold E.; Bretz, J Harlen; Currier, Louis W.

Thumbnail for Oil investigations in 1917 and 1918
Oil investigations in 1917 and 1918
Illinois State Geological Survey; Barrett, Nellie Okla; Nebel, Merle Louis; Coryell, Horace Noble; Tough, Fred H.; Williston, Samuel H.; Savage, Thomas Edmund