University of Illinois Urbana-Champaign

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Showing 1891–1920 of 2,849 items
Thumbnail for Second International Mathematics Study (SIMS) Instruments - Population A (Middle School)
Second International Mathematics Study (SIMS) Instruments - Population A (Middle School)
International Association for the Evaluation of Educational Achievement (IEA)

Thumbnail for The Chemistry of Soil Humic Acids
The Chemistry of Soil Humic Acids
Savage, Scott Maxfield

Thumbnail for Agro-ecology / 9:3-10
Agro-ecology / 9:3-10
Submitter: Howard Ding