@misc{indiciaed6cc950484c1,
  title = {Potentiometric surface of the Memphis Sand in the Memphis area, Tennessee, August 1978},
  author = {David D. Graham},
  year = {1979},
  doi = {10.3133/wri7980},
  url = {https://pubs.usgs.gov/publication/wri7980},
  note = {Source identifier: wri7980}
}