@misc{indiciaec34dc01439d0,
  title = {Ground-water levels in Arkansas, spring 1987},
  author = {D.A. Freiwald and Maria Plafcan},
  year = {1987},
  doi = {10.3133/ofr87459},
  url = {https://pubs.usgs.gov/publication/ofr87459},
  note = {Source identifier: ofr87459}
}