@misc{indiciae3d38570844cf,
  title = {Map showing the difference between the potentiometric surfaces of the Magothy Aquifer of September 1975 and September 1982 in southern Maryland},
  author = {Frederick K. Mack and Judith C. Wheeler and Stephen E. Curtin},
  year = {1982},
  doi = {10.3133/wri834283},
  url = {https://pubs.usgs.gov/publication/wri834283},
  note = {Source identifier: wri834283}
}