@misc{indiciae0077369870a1,
  title = {Geologic map of the Scalf quadrangle, southeastern Kentucky},
  author = {Paul L. Weis},
  year = {1975},
  doi = {10.3133/gq1267},
  url = {https://pubs.usgs.gov/publication/gq1267},
  note = {Source identifier: gq1267}
}