@misc{indiciae3b5b207c3a87,
  title = {Cobalt-bearing manganese deposits of Alabama, Georgia, and Tennessee},
  author = {William Gamewell Pierce},
  year = {1944},
  doi = {10.3133/b940j},
  url = {https://pubs.usgs.gov/publication/b940J},
  note = {Source identifier: b940J}
}