@misc{indiciae81d47158a895,
  title = {Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, September 2008},
  author = {Sandra L. Kinnaman and Joann F. Dixon},
  year = {2009},
  doi = {10.3133/sim3070},
  url = {https://pubs.usgs.gov/publication/sim3070},
  note = {Source identifier: sim3070}
}