@misc{indiciae136f017420cc,
  title = {Potentiometric surface map of the Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1980},
  author = {George R. Schiner and Eugene C. Hayes},
  year = {1980},
  doi = {10.3133/ofr801002},
  url = {https://pubs.usgs.gov/publication/ofr801002},
  note = {Source identifier: ofr801002}
}