@misc{indiciaeef6992e6bdf8,
  title = {Potentiometric surface of the upper Floridan aquifer, west-central Florida, September 1989},
  author = {Lari A. Knochenmus and G. L. Barr},
  year = {1990},
  doi = {10.3133/ofr90133},
  url = {https://pubs.usgs.gov/publication/ofr90133},
  note = {Source identifier: ofr90133}
}