@misc{indiciae48a321c6d8b7,
  title = {Geologic map of the Mannsville quadrangle, south-central Kentucky},
  author = {Alfred R. Taylor},
  year = {1966},
  doi = {10.3133/gq562},
  url = {https://pubs.usgs.gov/publication/gq562},
  note = {Source identifier: gq562}
}