University of Illinois Urbana-Champaign

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Showing 931–960 of 4,071 items
Thumbnail for Algal removal by alum coagulation
Algal removal by alum coagulation
Lin, S.D.; Evans, Ralph L.; Beuscher, D.B.

Thumbnail for Sand and gravel resources of Mason County, Illinois
Sand and gravel resources of Mason County, Illinois
Labotka, Theodore C.; Hester, Norman C.

Thumbnail for Vermilion River (Illinois River Basin) area assessment
Vermilion River (Illinois River Basin) area assessment
Illinois Deptartment of Natural Resources