TY - RPRT TI - Surface-water-quality assessment of the upper Illinois River Basin in Illinois, Indiana, and Wisconsin– Results of investigations through April 1992 AU - Arthur R. Schmidt AU - Stephen F. Blanchard PY - 1997 DO - 10.3133/wri964223 UR - https://pubs.usgs.gov/publication/wri964223 ID - wri964223 ER -