@misc{indiciae3101cb9eef7d,
  title = {Geologic map of the Knoxville Quadrangle, North Carolina, Tennessee, and South Carolina},
  author = {J. B. Hadley and A. E. Nelson},
  year = {1971},
  doi = {10.3133/i654},
  url = {https://pubs.usgs.gov/publication/i654},
  note = {Source identifier: i654}
}