University of Illinois Urbana-Champaign

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Showing 2191–2220 of 4,619 items
Thumbnail for Logan County soils / 39
Logan County soils / 39
Smith, Raymond Stratton

Thumbnail for The causes and effects of sedimentation in Lake Decatur
The causes and effects of sedimentation in Lake Decatur
Brown, Carl Barrier; Stall, John Byron; DeTurk, Ernest Everett

Thumbnail for Quality of surface water in Illinois, 1956-1966
Quality of surface water in Illinois, 1956-1966
Harmeson, Robert Harold; Larson, Thurston Eric