@misc{indiciae6ec6237dcd83,
  title = {Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, September 2006},
  author = {Sandra L. Kinnaman and Joann F. Dixon},
  year = {2007},
  doi = {10.3133/ofr20071215},
  url = {https://pubs.usgs.gov/publication/ofr20071215},
  note = {Source identifier: ofr20071215}
}