@misc{indiciae911b26044cbb,
  title = {Geologic map of the Dorton quadrangle, Pike County, Kentucky},
  author = {J.L. Barr and Harold H. Arndt},
  year = {1968},
  doi = {10.3133/gq713},
  url = {https://pubs.usgs.gov/publication/gq713},
  note = {Source identifier: gq713}
}