@misc{indiciae1669ced8bfc6,
  title = {Map showing the potentiometric surface of the Magothy Aquifer in southern Maryland, September 1979},
  author = {Frederick K. Mack and J. C. Wheeler and Stephen E. Curtin},
  year = {1980},
  doi = {10.3133/ofr80959},
  url = {https://pubs.usgs.gov/publication/ofr80959},
  note = {Source identifier: ofr80959}
}