@misc{indiciae9a50a1adddf5,
  title = {Potentiometric surface map of the Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, September, 1977},
  author = {F. A. Watkins and C. P. Laughlin and E. C. Hayes},
  year = {1977},
  doi = {10.3133/wri7869},
  url = {https://pubs.usgs.gov/publication/wri7869},
  note = {Source identifier: wri7869}
}