@misc{indiciaef8b7ac5a50c2,
  title = {Geologic map of the Troublesome Roadless Area, McCreary County, Kentucky},
  author = {W. R. Sigleo and A. H. Randall},
  year = {1981},
  doi = {10.3133/mf1341a},
  url = {https://pubs.usgs.gov/publication/mf1341A},
  note = {Source identifier: mf1341A}
}