@misc{indiciae587d04d171da,
  title = {Geologic map of the Berea quadrangle, east-central Kentucky},
  author = {Gordon Whitney Weir},
  year = {1967},
  doi = {10.3133/gq649},
  url = {https://pubs.usgs.gov/publication/gq649},
  note = {Source identifier: gq649}
}