University of Illinois Urbana-Champaign

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Showing 361–390 of 393 items
Thumbnail for Petroleum industry in Illinois, 1977. Part 1. Oil and gas developments
Petroleum industry in Illinois, 1977. Part 1. Oil and gas developments
Illinois State Geological Survey; Van Den Berg, Jacob; Lawry, Thomas F.

Thumbnail for Catalog of Devonian and deeper tests in central Illinois
Catalog of Devonian and deeper tests in central Illinois
Stevenson, D.L.; Keys, John N.; Cluff, Robert M.