@misc{indiciae21fa041dd3b5,
  title = {Water resources data Illinois, water year 1981; Volume 1, Illinois except Illinois River basin},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1982},
  doi = {10.3133/wdril811},
  url = {https://pubs.usgs.gov/publication/wdrIL811},
  note = {Source identifier: wdrIL811}
}