1. Water-quality assessment of the lower Illinois River Basin : environmental setting Author/Creator: Warner, Kelly L., author Publication/Creation: Urbana, Illinois : U.S. Department of the Interior, U.S. Geological Survey, 1998 Resource Type: Book Access & Availability: Loading
2. Water-quality assessment of the upper Illinois River Basin in Illinois, Indiana, and Wisconsin : nutrients, dissolved oxygen, and fecal-indicator bacteria in surface water, April 1987 through August 1990 Author/Creator: Terrio, Paul J., author Publication/Creation: [Washington, D.C.] : U.S. Department of the Interior, U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading