@misc{indiciae69bfc1ad7635,
  title = {Geologic map of the Milburn quadrangle, Carlisle and Hickman Counties, Kentucky},
  author = {Roger Warren Swanson},
  year = {1977},
  doi = {10.3133/gq1420},
  url = {https://pubs.usgs.gov/publication/gq1420},
  note = {Source identifier: gq1420}
}