@misc{indiciaef8d2ac6605c7,
  title = {Nickel-gold ore of the mackinaw mine, Snohomish County, Washington},
  author = {C. Milton and D.J. Milton},
  year = {1958},
  doi = {10.2113/gsecongeo.53.4.426},
  url = {https://pubs.usgs.gov/publication/70206438},
  note = {Source identifier: 70206438}
}