@misc{indiciae22bca46d340d,
  title = {Engineering geology of Lexington and Fayette County, Kentucky},
  author = {Charles George Johnson and H. T. Hopkins},
  year = {1966},
  doi = {10.3133/ofr6669},
  url = {https://pubs.usgs.gov/publication/ofr6669},
  note = {Source identifier: ofr6669}
}