@misc{indiciaed96fa5875cf5,
  title = {Geologic map of the Barbourville quadrangle, Knox and Whitley Counties, Kentucky},
  author = {Wayne L. Newell},
  year = {1975},
  doi = {10.3133/gq1254},
  url = {https://pubs.usgs.gov/publication/gq1254},
  note = {Source identifier: gq1254}
}