University of Illinois Urbana-Champaign

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Showing 181–210 of 6,780 items
Thumbnail for Acidity and acidimetry of soils
Acidity and acidimetry of soils
Knight, Henry Granger

Thumbnail for Development of paleobotany in the Illinois Basin
Development of paleobotany in the Illinois Basin
Phillips, Tom Lee; Pfefferkorn, Hermann W.; Peppers, Russel A.