TY  - RPRT
TI  - Water resources data for Illinois, water year 1981; Volume 2, Illinois River basin
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1982
DO  - 10.3133/wdril812
UR  - https://pubs.usgs.gov/publication/wdrIL812
ID  - wdrIL812
ER  -