University of Illinois Urbana-Champaign

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Showing 1351–1380 of 12,500 items
Thumbnail for The mica in argillaceous sediments
The mica in argillaceous sediments
Grim, Ralph E.; Bray, Roger Hammond; Bradley, William Frank

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.