@misc{indiciae5140b171f2db,
  title = {Preliminary Notes on the Geology of the Royal Mine Area, Livingston County, Kentucky},
  author = {H. J. Klepser},
  year = {1945},
  doi = {10.3133/ofr457},
  url = {https://pubs.usgs.gov/publication/ofr457},
  note = {Source identifier: ofr457}
}