@misc{indiciae6249aef5545a,
  title = {Altitude and generalized configuration of the top of the Floridan aquifer, St. Johns County, Florida},
  author = {Rick M. Spechler},
  year = {1983},
  doi = {10.3133/wri834101},
  url = {https://pubs.usgs.gov/publication/wri834101},
  note = {Source identifier: wri834101}
}