@misc{indiciae22653c59a72a,
  title = {The difference between the potentiometric surfaces of the Aquia aquifer of September 1982 and September 1995 in southern Maryland},
  author = {Stephen E. Curtin and David C. Andreasen and Frederick K. Mack},
  year = {1996},
  doi = {10.3133/ofr96624},
  url = {https://pubs.usgs.gov/publication/ofr96624},
  note = {Source identifier: ofr96624}
}