@misc{indiciaebf44ce3a1677,
  title = {Manganese resources of the Olympic Peninsula, Washington},
  author = {C. F. Park},
  year = {1941},
  doi = {10.3133/ofr4111},
  url = {https://pubs.usgs.gov/publication/ofr4111},
  note = {Source identifier: ofr4111}
}