University of Illinois Urbana-Champaign

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Showing 1081–1102 of 1,102 items
Thumbnail for Petroleum industry in Illinois, 1984. Oil and gas developments
Petroleum industry in Illinois, 1984. Oil and gas developments
Van Den Berg, Jacob; Treworgy, Janis D.; Elyn, Jaclyn Rendall

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 Illinois farm economics. 101-170
Illinois farm economics. 101-170
University of Illinois at Urbana-Champaign. Extension Service in Agriculture and Home Economics