@misc{indiciae594aff278c42,
  title = {Ground-water levels in observation wells in Oklahoma, 1967-68},
  author = {R.H. Bingham},
  year = {1969},
  doi = {10.3133/ofr69335},
  url = {https://pubs.usgs.gov/publication/ofr69335},
  note = {Source identifier: ofr69335}
}