@misc{indiciae4fbcff2771de,
  title = {Geologic map of the Roaring Spring quadrangle, Kentucky-Tennessee},
  author = {Harry Klemic and George E. Ulrich},
  year = {1967},
  doi = {10.3133/gq658},
  url = {https://pubs.usgs.gov/publication/gq658},
  note = {Source identifier: gq658}
}