@misc{indiciae11ad6a53a1a8,
  title = {Geologic map of the Anawalt quadrangle, West Virginia-Virginia},
  author = {Virgil A. Trent and Frank Darwyn Spencer},
  year = {1990},
  doi = {10.3133/gq1668},
  url = {https://pubs.usgs.gov/publication/gq1668},
  note = {Source identifier: gq1668}
}