@misc{indiciaebd7b3ee1b828,
  title = {Potentiometric surface of the upper Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1987},
  author = {L. A. Bradner},
  year = {1987},
  doi = {10.3133/ofr87688},
  url = {https://pubs.usgs.gov/publication/ofr87688},
  note = {Source identifier: ofr87688}
}