@misc{indiciae266ec8deca72,
  title = {Geologic map of the Keokee quadrangle, Virginia-Kentucky},
  author = {Ralph L. Miller and John B. Roen},
  year = {1971},
  doi = {10.3133/gq851},
  url = {https://pubs.usgs.gov/publication/gq851},
  note = {Source identifier: gq851}
}