@misc{indiciaecc9290375537,
  title = {Potentiometric surface of the Aquia Aquifer in southern Maryland during September 1988},
  author = {Frederick K. Mack and David C. Andreasen and Stephen E. Curtin and Judith C. Wheeler},
  year = {1990},
  doi = {10.3133/wri904037},
  url = {https://pubs.usgs.gov/publication/wri904037},
  note = {Source identifier: wri904037}
}