@misc{indiciae6a6a4f26fa94,
  title = {Geology of the Tyrone quadrangle, Kentucky},
  author = {Earle Rupert Cressman},
  year = {1964},
  doi = {10.3133/gq303},
  url = {https://pubs.usgs.gov/publication/gq303},
  note = {Source identifier: gq303}
}