@misc{indiciae8b22fb773f74,
  title = {The manganese oxide minerals, a preliminary report},
  author = {Michael Fleischer and W.E. Richmond},
  year = {1943},
  doi = {10.2113/gsecongeo.38.4.269},
  url = {https://pubs.usgs.gov/publication/70213009},
  note = {Source identifier: 70213009}
}