@misc{indiciae6a6759fdcaaa,
  title = {Ground-water levels in observation wells in Oklahoma, 1956-1960},
  author = {D.L. Hart},
  year = {1963},
  doi = {10.3133/ofr63150},
  url = {https://pubs.usgs.gov/publication/ofr63150},
  note = {Source identifier: ofr63150}
}