@misc{indiciae18395128a673,
  title = {Geologic map of the Occoquan Quadrangle and part of the Fort Belvoir Quadrangle, Prince William and Fairfax counties, Virginia},
  author = {V.M. Seiders and R. B. Mixon},
  year = {1981},
  doi = {10.3133/i1175},
  url = {https://pubs.usgs.gov/publication/i1175},
  note = {Source identifier: i1175}
}