@misc{indiciaec2df44b84bd9,
  title = {Geology of the Madisonville West quadrangle, Kentucky},
  author = {Thomas M. Kehn},
  year = {1964},
  doi = {10.3133/gq346},
  url = {https://pubs.usgs.gov/publication/gq346},
  note = {Source identifier: gq346}
}