@misc{indiciaefa7b52e4b531,
  title = {Quality of water from public-supply wells in principal aquifers of Illinois, 1984-87},
  author = {David C. Voelker},
  year = {1989},
  doi = {10.3133/wri884111},
  url = {https://pubs.usgs.gov/publication/wri884111},
  note = {Source identifier: wri884111}
}