@misc{indiciae430d2ed43e1d,
  title = {Geologic map of the Pembroke quadrangle, Christian and Todd Counties, Kentucky},
  author = {Samuel L. Moore},
  year = {1968},
  doi = {10.3133/gq709},
  url = {https://pubs.usgs.gov/publication/gq709},
  note = {Source identifier: gq709}
}