@misc{indiciae25653fdf7bdc,
  title = {Potentiometric surface of the upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1989},
  author = {George R. Schiner},
  year = {1989},
  doi = {10.3133/ofr89417},
  url = {https://pubs.usgs.gov/publication/ofr89417},
  note = {Source identifier: ofr89417}
}