@misc{indiciae77a8546b836d,
  title = {Potentiometric surface of the upper Floridan aquifer in the St. Johns River Water Management District and vicinity, May 1990},
  author = {Louis C. Murray},
  year = {1990},
  doi = {10.3133/ofr90557},
  url = {https://pubs.usgs.gov/publication/ofr90557},
  note = {Source identifier: ofr90557}
}