@misc{indiciaebca05d60708e,
  title = {Nickel deposits near Mount Vernon, Skagit County, Washington},
  author = {S. W. Hobbs and W. T. Pecora},
  year = {1941},
  doi = {10.3133/ofr419},
  url = {https://pubs.usgs.gov/publication/ofr419},
  note = {Source identifier: ofr419}
}