@misc{indiciae96d379929309,
  title = {Deposits of the manganese oxides},
  author = {Richard G. Petersen},
  year = {1960},
  doi = {10.2113/gsecongeo.55.1.1},
  url = {https://pubs.usgs.gov/publication/70221609},
  note = {Source identifier: 70221609}
}