@misc{indiciae97021a58bb7f,
  title = {California ground-water quality},
  author = {C. E. Lamb and Richard Woodard},
  year = {1987},
  doi = {10.3133/ofr87715},
  url = {https://pubs.usgs.gov/publication/ofr87715},
  note = {Source identifier: ofr87715}
}