@misc{indiciaebb294925bd6c,
  title = {Geology of the Sulphur Lick quadrangle, Kentucky},
  author = {Leonard D. Harris},
  year = {1964},
  doi = {10.3133/gq323},
  url = {https://pubs.usgs.gov/publication/gq323},
  note = {Source identifier: gq323}
}