@misc{indiciae834d982739b1,
  title = {Geologic map of the Seneca quadrangle, Montgomery County, Maryland, and Fairfax and Loudoun Counties, Virginia},
  author = {Avery Ala Drake and Scott Southworth and K. Y. Lee},
  year = {1999},
  doi = {10.3133/gq1802},
  url = {https://pubs.usgs.gov/publication/gq1802},
  note = {Source identifier: gq1802}
}