@misc{indiciae05a316133f9b,
  title = {Geologic map of the Manassas quadrangle, Fairfax and Prince William Counties, Virginia},
  author = {Avery Ala Drake and A.J. Froelich and R. E. Weems and K. Y. Lee},
  year = {1994},
  doi = {10.3133/gq1732},
  url = {https://pubs.usgs.gov/publication/gq1732},
  note = {Source identifier: gq1732}
}