University of Illinois Urbana-Champaign

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Showing 7231–7260 of 8,056 items
Thumbnail for Headwaters area assessment
Headwaters area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis

Thumbnail for Oil and gas development in Illinois in 1954
Oil and gas development in Illinois in 1954
Bell, Alfred Hannam; Kline, Virginia Harriet

Thumbnail for Petrographic and coking characteristics of coal : laboratory study of Illinois coal seams nos. 5 and 6
Petrographic and coking characteristics of coal : laboratory study of Illinois coal seams nos. 5 and 6
Marshall, Charles Edward; Harrison, John A.; Simon, Jack A.; Parker, Margaret A.