University of Illinois Urbana-Champaign

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Showing 8971–9000 of 14,631 items
Thumbnail for 50 ways farmers can protect their groundwater / 1324
50 ways farmers can protect their groundwater / 1324
Simmons, F. William; Giles, Ed; Peterson, Doug

Thumbnail for A summary of the uses of limestone and dolomite
A summary of the uses of limestone and dolomite
Lamar, John Everts; Willman, Harold Bowen

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.