@misc{indiciae599093c5dee9,
  title = {Preliminary map showing the difference between the potentiometric surfaces of the Aquia Aquifer of September 1982 and September 1984 in southern Maryland},
  author = {Frederick K. Mack and Judith C. Wheeler and Stephen E. Curtin and David C. Andreasen},
  year = {1985},
  doi = {10.3133/wri854339},
  url = {https://pubs.usgs.gov/publication/wri854339},
  note = {Source identifier: wri854339}
}