@misc{indiciaeac93b8114b95,
  title = {Mineral resources of Knox County, Tennessee},
  author = {Larry D. Harris and Robert A. Laurence},
  year = {1974},
  doi = {10.3133/i767n},
  url = {https://pubs.usgs.gov/publication/i767N},
  note = {Source identifier: i767N}
}