@misc{indiciae4737e9e7ca66,
  title = {Preliminary report on the bedrock geology and copper deposits of the Matchwood quadrangle, Ontonagon County, Michigan},
  author = {Robert Francis Johnson and Walter Stanley White},
  year = {1969},
  doi = {10.3133/ofr69135},
  url = {https://pubs.usgs.gov/publication/ofr69135},
  note = {Source identifier: ofr69135}
}