@misc{indiciae1cc4f6fa5e6f,
  title = {Map showing the potentiometric surface of the Magothy Aquifer in southern Maryland, September 1981},
  author = {F. K. Mack and J. C. Wheeler and S. E. Curtin},
  year = {1982},
  doi = {10.3133/ofr82257},
  url = {https://pubs.usgs.gov/publication/ofr82257},
  note = {Source identifier: ofr82257}
}