@misc{indiciaec762ea978df4,
  title = {Geologic map of the Vienna quadrangle, Fairfax County, Virginia, and Montgomery County, Maryland},
  author = {Avery Ala Drake and K. Y. Lee},
  year = {1989},
  doi = {10.3133/gq1670},
  url = {https://pubs.usgs.gov/publication/gq1670},
  note = {Source identifier: gq1670}
}