@misc{indiciae29042ad7934b,
  title = {Geology and coal resources of the Pioneer quadrangle, Scott and Campbell Counties, Tennessee},
  author = {Kenneth John Englund},
  year = {1957},
  doi = {10.3133/coal39},
  url = {https://pubs.usgs.gov/publication/coal39},
  note = {Source identifier: coal39}
}