@misc{indiciae6915d6e85266,
  title = {Potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1999},
  author = {Leel Knowles},
  year = {2000},
  doi = {10.3133/ofr00246},
  url = {https://pubs.usgs.gov/publication/ofr00246},
  note = {Source identifier: ofr00246}
}