@misc{indiciae557e5d1e8b0f,
  title = {Geologic map of the Berlin quadrangle, Bracken and Pendleton Counties, Kentucky},
  author = {Stanley J. Luft},
  year = {1975},
  doi = {10.3133/gq1256},
  url = {https://pubs.usgs.gov/publication/gq1256},
  note = {Source identifier: gq1256}
}