@misc{indiciae8c1c48fe909a,
  title = {South Dakota ground-water quality},
  author = {N.C. Koch and S.J. Lawrence and Jeanne Goodman and S.M. Pirner},
  year = {1987},
  doi = {10.3133/ofr87752},
  url = {https://pubs.usgs.gov/publication/ofr87752},
  note = {Source identifier: ofr87752}
}