@misc{indiciaee1120b61ad2e,
  title = {Hydrogeology of, and quality and recharge ages of ground water in Prince William County, Virginia, 1990-91},
  author = {D.L. Nelms and A. R. Brockman},
  year = {1997},
  doi = {10.3133/wri974009},
  url = {https://pubs.usgs.gov/publication/wri974009},
  note = {Source identifier: wri974009}
}