@misc{indiciae8c82845bdc25,
  title = {Geologic map of the Arcola Quadrangle, Loudoun and Fairfax counties, Virginia},
  author = {K. Y. Lee},
  year = {1978},
  doi = {10.3133/mf973},
  url = {https://pubs.usgs.gov/publication/mf973},
  note = {Source identifier: mf973}
}