@misc{indiciaef08d288c7868,
  title = {Geology and ore deposits of the Ducktown mining district, Tennessee},
  author = {W. H. Emmons and F.B. Laney and Arthur with the active collaboration of Keith},
  year = {1926},
  doi = {10.3133/pp139},
  url = {https://pubs.usgs.gov/publication/pp139},
  note = {Source identifier: pp139}
}