@misc{indiciaec72782789eee,
  title = {Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2002},
  author = {Stephen E. Curtin and David C. Andreasen and Judith C. Wheeler},
  year = {2003},
  doi = {10.3133/ofr2003258},
  url = {https://pubs.usgs.gov/publication/ofr2003258},
  note = {Source identifier: ofr2003258}
}