@misc{indiciae4414e4464011,
  title = {Geologic map of the Annandale quadrangle, Fairfax and Arlington Counties, and Alexandria City, Virginia},
  author = {Avery Ala Drake and A.J. Froelich},
  year = {1986},
  doi = {10.3133/gq1601},
  url = {https://pubs.usgs.gov/publication/gq1601},
  note = {Source identifier: gq1601}
}