@misc{indiciaebbf752e64c8f,
  title = {Geologic map of parts of the Cairo and Barlow quadrangles, Ballard County, Kentucky},
  author = {Wilds W. Olive},
  year = {1971},
  doi = {10.3133/gq885},
  url = {https://pubs.usgs.gov/publication/gq885},
  note = {Source identifier: gq885}
}