@misc{indiciae04723d27d537,
  title = {Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 2002},
  author = {Stephen E. Curtin and David C. Andreasen and Judith C. Wheeler},
  year = {2003},
  doi = {10.3133/ofr2003257},
  url = {https://pubs.usgs.gov/publication/ofr2003257},
  note = {Source identifier: ofr2003257}
}