@misc{indiciae48b22651e88a,
  title = {Manganese deposits at Philipsburg, Granite County, Montana, a preliminary report},
  author = {Edwin N. Goddard},
  year = {1940},
  doi = {10.3133/b922g},
  url = {https://pubs.usgs.gov/publication/b922G},
  note = {Source identifier: b922G}
}