@misc{indiciaefd34a95c9943,
  title = {Potentiometric surface of the upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1987},
  author = {George R. Schiner},
  year = {1987},
  doi = {10.3133/ofr87464},
  url = {https://pubs.usgs.gov/publication/ofr87464},
  note = {Source identifier: ofr87464}
}