@misc{indiciaeb1a9ac304453,
  title = {Geologic map of the Mount Olivet quadrangle, Robertson and Bracken Counties, Kentucky},
  author = {Roberts Manning Wallace},
  year = {1977},
  doi = {10.3133/gq1404},
  url = {https://pubs.usgs.gov/publication/gq1404},
  note = {Source identifier: gq1404}
}