@misc{indiciae4b78e8d1d02d,
  title = {Potentiometric surface of the upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1999},
  author = {L. A. Bradner and Leel Knowles},
  year = {1999},
  doi = {10.3133/ofr99608},
  url = {https://pubs.usgs.gov/publication/ofr99608},
  note = {Source identifier: ofr99608}
}