@misc{indiciae03f99dfd1f69,
  title = {Manganese deposits of the United States, with sections on foreign deposits, chemistry, and uses},
  author = {Edmund Cecil Harder},
  year = {1910},
  doi = {10.3133/b427},
  url = {https://pubs.usgs.gov/publication/b427},
  note = {Source identifier: b427}
}