@misc{indiciaef2fc112fcc2d,
  title = {Geologic map of the Bruin quadrangle, Elliott and Carter Counties, Kentucky},
  author = {Kenneth John Englund and A.O. DeLaney},
  year = {1966},
  doi = {10.3133/gq522},
  url = {https://pubs.usgs.gov/publication/gq522},
  note = {Source identifier: gq522}
}