@misc{indiciae7a4d3b0fe6fd,
  title = {Potentiometric surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 2009},
  author = {Sandra L. Kinnaman and Joann F. Dixon},
  year = {2009},
  doi = {10.3133/sim3091},
  url = {https://pubs.usgs.gov/publication/sim3091},
  note = {Source identifier: sim3091}
}