@misc{indiciae8ae4f9e6cb94,
  title = {Geologic map of the Swan Island quadrangle, northeastern Tennessee},
  author = {Robert B. Mixon and Leonard D. Harris},
  year = {1971},
  doi = {10.3133/gq878},
  url = {https://pubs.usgs.gov/publication/gq878},
  note = {Source identifier: gq878}
}