University of Illinois Urbana-Champaign

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Showing 2671–2700 of 2,750 items
Thumbnail for Big Muddy River area assessment
Big Muddy River area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis; Illinois Department of Natural Resources. State Geological Survey Division

Thumbnail for Prairie Parklands area assessment
Prairie Parklands area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis

Thumbnail for Vermilion River (Illinois River Basin) area assessment
Vermilion River (Illinois River Basin) area assessment
Illinois Deptartment of Natural Resources

Thumbnail for Petroleum industry in Illinois, 1967
Petroleum industry in Illinois, 1967
Van Den Berg, Jacob; Lawry, T.F.; Mast, Richard F.