University of Illinois Urbana-Champaign

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Showing 1921–1950 of 20,903 items
Thumbnail for Illinois Water and Climate Summary, 2009
Illinois Water and Climate Summary, 2009
Water and Atmopheric Resource Monitoring Program

Thumbnail for Year in review / 1999-07
Year in review / 1999-07
University of Illinois at Urbana-Champaign. Deptartment of Geology

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.