@misc{indiciaeef48ad437a2e,
  title = {Water-quality data from the observation-well network in Illinois, 1985-87},
  author = {D. C. Voelker and D.J. Oberg and M.J. Grober},
  year = {1988},
  doi = {10.3133/ofr87538},
  url = {https://pubs.usgs.gov/publication/ofr87538},
  note = {Source identifier: ofr87538}
}