@misc{indiciae7ade18d66c79,
  title = {The occurrence of cobalt and nickel in the Silver Summit Mine, Coeur d'Alene district, Idaho},
  author = {Verne Charles Fryklund and Murl W. Hutchinson},
  year = {1954},
  doi = {10.2113/gsecongeo.49.7.753},
  url = {https://pubs.usgs.gov/publication/70220058},
  note = {Source identifier: 70220058}
}