@misc{indiciaee706bad58dd9,
  title = {Preliminary geologic map of the Herndon Quadrangle, Virginia},
  author = {R. E. Eggleton},
  year = {1975},
  doi = {10.3133/ofr75386},
  url = {https://pubs.usgs.gov/publication/ofr75386},
  note = {Source identifier: ofr75386}
}