University of Illinois Urbana-Champaign

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Showing 2761–2790 of 2,875 items
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

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.