@misc{indiciaef21ca2c66929,
  title = {Potentiometric surface of the Magothy Aquifer in southern Maryland during the fall of 1987},
  author = {Frederick K. Mack and David C. Andreasen and Stephen E. Curtin and Judith C. Wheeler},
  year = {1989},
  doi = {10.3133/wri894013},
  url = {https://pubs.usgs.gov/publication/wri894013},
  note = {Source identifier: wri894013}
}