@misc{indiciae532f1b1da75b,
  title = {Nickel deposit near Riddle, Douglas County, Oregon},
  author = {W. T. Pecora and S. W. Hobbs},
  year = {1942},
  doi = {10.3133/b931i},
  url = {https://pubs.usgs.gov/publication/b931I},
  note = {Source identifier: b931I}
}