University of Illinois Urbana-Champaign

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Showing 4021–4050 of 5,637 items
Thumbnail for Mass balance of nitrogen and phosphorus in an agricultural watershed : the shallow groundwater component
Mass balance of nitrogen and phosphorus in an agricultural watershed : the shallow groundwater component
Mehnert, Edward; Dey, William S.; Hwang, Hue-Hwa; Keefer, Donald A.; Holm, Thomas R.; Johnson, Thomas M.; Beaumont, Will C.; Wander, Matthew C.F.; Sanford, Robert A.; McDonald, Jennifer M.; Shiffer, Shawn M.

Thumbnail for Illinois mineral industry in 1944
Illinois mineral industry in 1944
Voskuil, Walter Henry; Stevens, Douglas F.

Thumbnail for Irrigation Practices in Illinois
Irrigation Practices in Illinois
Bowman, Jean A.; Kimpel, Brian C.