University of Illinois Urbana-Champaign

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Showing 1771–1800 of 6,159 items
Thumbnail for Illinois mineral industry in 1941
Illinois mineral industry in 1941
Voskuil, Walter Henry; Stevens, Douglas F.; Oliver, G.N.

Thumbnail for Big Muddy River area assessment
Big Muddy River area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis; Illinois Department of Natural Resources. State Geological Survey Division

Thumbnail for ISAS 2013 Annual Report
ISAS 2013 Annual Report
Submitter: Susan Braxton

Thumbnail for Mineral industries of Illinois
Mineral industries of Illinois
Christensen, H.P.; Erb, E.