University of Illinois Urbana-Champaign

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Showing 2431–2460 of 4,292 items
Thumbnail for Embarras River area assessment
Embarras River area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis

Thumbnail for Oil and gas development in Illinois in 1940
Oil and gas development in Illinois in 1940
Bell, Alfred Hannam; Cohee, George Vincent

Thumbnail for Shawnee area assessment
Shawnee area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis; Illinois Department of Natural Resources, Illinois State Water Survey