@misc{indiciaec908c6680a89,
  title = {Geologic map of the Somerset quadrangle, Pulaski County, Kentucky},
  author = {Richard Quintin Lewis},
  year = {1974},
  doi = {10.3133/gq1196},
  url = {https://pubs.usgs.gov/publication/gq1196},
  note = {Source identifier: gq1196}
}