University of Illinois Urbana-Champaign

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Showing 4261–4290 of 8,476 items
Thumbnail for Assessing the removal of air toxics in marketed Illinois coals by gravity-based cleaning
Assessing the removal of air toxics in marketed Illinois coals by gravity-based cleaning
Demir, Ilham; Ruch, Rodney R.; Lytle, John M.; Steele, John D.; Rohl, Chris C.

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