@misc{indiciae215ebfccfdb3,
  title = {Geology of the Offutt quadrangle, Kentucky},
  author = {William F. Outerbridge},
  year = {1964},
  doi = {10.3133/gq348},
  url = {https://pubs.usgs.gov/publication/gq348},
  note = {Source identifier: gq348}
}