@misc{indiciaec3e9fbdc304e,
  title = {Geologic map of the Lewisburg quadrangle, Logan County, Kentucky},
  author = {Henry C. Rainey and R.C. Miller},
  year = {1969},
  doi = {10.3133/gq830},
  url = {https://pubs.usgs.gov/publication/gq830},
  note = {Source identifier: gq830}
}