@misc{indiciae93e4440f57e2,
  title = {Iron and Manganese -- Preliminary report on the red iron ores of east Tennessee, northeast Alabama, and northwest Georgia},
  author = {E. F. Burchard},
  year = {1914},
  doi = {10.3133/b540g},
  url = {https://pubs.usgs.gov/publication/b540G},
  note = {Source identifier: b540G}
}