@misc{indiciaee260353bdae8,
  title = {Potentiometric Surface in the Sparta-Memphis Aquifer of the Mississippi Embayment, Spring 2007},
  author = {T. P. Schrader},
  year = {2008},
  doi = {10.3133/sim3014},
  url = {https://pubs.usgs.gov/publication/sim3014},
  note = {Source identifier: sim3014}
}