@misc{indiciae28d1b083d19c,
  title = {Potentiometric surface of the upper Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, May 2003},
  author = {Sandra L. Kinnaman and Leel Knowles},
  year = {2004},
  doi = {10.3133/ofr20041077},
  url = {https://pubs.usgs.gov/publication/ofr20041077},
  note = {Source identifier: ofr20041077}
}