University of Illinois Urbana-Champaign

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Showing 1471–1500 of 1,637 items
Thumbnail for Mackinaw River area assessment.
Mackinaw River area assessment.
Illinois Department of Natural Resources

Thumbnail for Petroleum industry in Illinois, 1971. Part I. Oil and gas developments
Petroleum industry in Illinois, 1971. Part I. Oil and gas developments
Illinois State Geological Survey; Van Den Berg, Jacob; Lawry, Thomas F.