@misc{indiciae099cf6da2f3b,
  title = {Potentiometric levels and water quality in the aquifers underlying Belvidere, Illinois, 1993–96},
  author = {P.C. Mills and C.A. Thomas and T.A. Brown and D.J. Yeskis and R.T. Kay},
  year = {1999},
  doi = {10.3133/wri984220},
  url = {https://pubs.usgs.gov/publication/wri984220},
  note = {Source identifier: wri984220}
}