@misc{indiciaec35b26efa3d5,
  title = {Geology of the Holland quadrangle, Kentucky–Tennessee},
  author = {Willis H. Nelson},
  year = {1962},
  doi = {10.3133/gq174},
  url = {https://pubs.usgs.gov/publication/gq174},
  note = {Source identifier: gq174}
}