@misc{indiciae929a831d7475,
  title = {Geologic map of the Millport quadrangle, Muhlenberg and Hopkins Counties, Kentucky},
  author = {George J. Franklin},
  year = {1973},
  doi = {10.3133/gq1050},
  url = {https://pubs.usgs.gov/publication/gq1050},
  note = {Source identifier: gq1050}
}