@misc{indiciae44fbad1a2ae4,
  title = {Potentiometric surface of the upper Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September, 2002},
  author = {Sandra L. Kinnaman and Leel Knowles},
  year = {2003},
  doi = {10.3133/ofr03209},
  url = {https://pubs.usgs.gov/publication/ofr03209},
  note = {Source identifier: ofr03209}
}