University of Illinois Urbana-Champaign

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Showing 5161–5190 of 5,946 items
Thumbnail for Functional Groups of Soil Humic Acids
Functional Groups of Soil Humic Acids
Butler, John Herbert Anthony

Thumbnail for Petroleum industry in Illinois, 1966
Petroleum industry in Illinois, 1966
Van Den Berg, Jacob; Lawry, T.F.; Mast, Richard F.