TY - RPRT TI - Water resources data for Illinois, water year 1980; Volume 2, Illinois River basin AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1981 DO - 10.3133/wdril802 UR - https://pubs.usgs.gov/publication/wdrIL802 ID - wdrIL802 ER -