@misc{indiciaefeced8fd11b7,
  title = {Geologic map of the Dingus quadrangle, eastern Kentucky},
  author = {William F. Outerbridge},
  year = {1978},
  doi = {10.3133/gq1463},
  url = {https://pubs.usgs.gov/publication/gq1463},
  note = {Source identifier: gq1463}
}