@misc{indiciaebad8ab08e677,
  title = {Geologic framework, hydrogeology, and ground-water quality of the Potomac Group aquifer system, northwestern Charles County, Maryland},
  author = {Steven N. Hiortdahl},
  year = {1997},
  doi = {10.3133/wri914059},
  url = {https://pubs.usgs.gov/publication/wri914059},
  note = {Source identifier: wri914059}
}