@misc{indiciaed881a59052d6,
  title = {Geologic map of the Powersburg quadrangle and part of the Pall Mall quadrangle, Wayne and Clinton Counties, Kentucky},
  author = {Richard Quintin Lewis},
  year = {1977},
  doi = {10.3133/gq1377},
  url = {https://pubs.usgs.gov/publication/gq1377},
  note = {Source identifier: gq1377}
}