@misc{indiciaeb7242d6a31a1,
  title = {Hydrogeology of the Cambrian-Ordovician aquifer system at a test well in northeastern Illinois},
  author = {J.R. Nicholas and M.G. Sherrill and H. L. Young},
  year = {1987},
  doi = {10.3133/wri844165},
  url = {https://pubs.usgs.gov/publication/wri844165},
  note = {Source identifier: wri844165}
}