@misc{indiciae74c636eb5668,
  title = {Geology of the Howe Valley quadrangle, Kentucky},
  author = {Roy Clark Kepferle},
  year = {1963},
  doi = {10.3133/gq232},
  url = {https://pubs.usgs.gov/publication/gq232},
  note = {Source identifier: gq232}
}