University of Illinois Urbana-Champaign

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Showing 4201–4230 of 4,250 items
Thumbnail for Petroleum industry in Illinois, 1972. Part I. Oil and gas developments
Petroleum industry in Illinois, 1972. Part I. Oil and gas developments
Illinois State Geological Survey; Van Den Berg, Jacob; Lawry, Thomas F.

Thumbnail for Illinois River Bluffs Area Assessment
Illinois River Bluffs Area Assessment
Illinois Department of Natural Resources

Thumbnail for Illinois research. [vol.6-vol.10]
Illinois research. [vol.6-vol.10]
Submitter: Howard Ding