@misc{indiciae75ea125a32dd,
  title = {Estimated potentiometric surface for the Tertiary limestone aquifer system, southeastern United States, prior to development},
  author = {Richard H. Johnston and R.E. Krause and F.W. Meyer and P.D. Ryder and C. H. Tibbals and J. D. Hunn},
  year = {1980},
  doi = {10.3133/ofr80406},
  url = {https://pubs.usgs.gov/publication/ofr80406},
  note = {Source identifier: ofr80406}
}