@misc{indiciaea0e116cf4114,
  title = {Geologic map of the Hammacksville quadrangle, Kentucky-Tennessee},
  author = {Harry Klemic},
  year = {1966},
  doi = {10.3133/gq540},
  url = {https://pubs.usgs.gov/publication/gq540},
  note = {Source identifier: gq540}
}