University of Illinois Urbana-Champaign

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Showing 4681–4710 of 5,373 items
Thumbnail for Geology for planning in the Springfield-Decatur region, Illinois
Geology for planning in the Springfield-Decatur region, Illinois
Bergstrom, Robert E.; Piskin, Kemal; Follmer, Leon R.

Thumbnail for Petroleum industry in Illinois, 1970. Part I. Oil and Gas Developments
Petroleum industry in Illinois, 1970. Part I. Oil and Gas Developments
Illinois State Geological Survey; Van Den Berg, Jacob; Lawry, Thomas F.