@misc{indiciae355071b2536d,
  title = {Geologic map of the Blandville quadrangle, Ballard and Carlisle Counties, Kentucky},
  author = {Wilds W. Olive},
  year = {1971},
  doi = {10.3133/gq938},
  url = {https://pubs.usgs.gov/publication/gq938},
  note = {Source identifier: gq938}
}