@misc{indiciaeaf43106c1d78,
  title = {Potentiometric surface map of the Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1979},
  author = {Charles P. Laughlin and E. C. Hayes and George R. Schiner},
  year = {1980},
  doi = {10.3133/ofr8069},
  url = {https://pubs.usgs.gov/publication/ofr8069},
  note = {Source identifier: ofr8069}
}