@misc{indiciae5e5bf91d2dbe,
  title = {Deposits of manganese ore in Montana, Utah, Oregon, and Washington},
  author = {J. T. Pardee},
  year = {1922},
  doi = {10.3133/b725c},
  url = {https://pubs.usgs.gov/publication/b725C},
  note = {Source identifier: b725C}
}