@misc{indiciaeb4a5ad3bb225,
  title = {Potentiometric surface of the upper Patapsco aquifer in southern Maryland, September - October 1996},
  author = {Stephen E. Curtin and D. C. Andreasen and Frederick K. Mack},
  year = {1997},
  doi = {10.3133/ofr97790},
  url = {https://pubs.usgs.gov/publication/ofr97790},
  note = {Source identifier: ofr97790}
}