@misc{indiciaece9a9813569c,
  title = {Ground-water levels in Arkansas, spring 1989},
  author = {P.W. Westerfield and G.J. Gonthier},
  year = {1990},
  doi = {10.3133/ofr90121},
  url = {https://pubs.usgs.gov/publication/ofr90121},
  note = {Source identifier: ofr90121}
}