@misc{indiciaec5948ece3a78,
  title = {Potentiometric surface of the upper Floridan aquifer, in Georgia, and adjacent parts of Alabama, Florida, and South Carolina, May-June 1990},
  author = {Michael F. Peck},
  year = {1991},
  doi = {10.3133/ofr91206},
  url = {https://pubs.usgs.gov/publication/ofr91206},
  note = {Source identifier: ofr91206}
}