TY  - RPRT
TI  - Water resources data for Illinois, water year 1971
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1972
DO  - 10.3133/wdril711
UR  - https://pubs.usgs.gov/publication/wdrIL711
ID  - wdrIL711
ER  -