@misc{indiciae9628021eb085,
  title = {Effects of laboratory treatments on silver and other elements in native gold},
  author = {W. L. Campbell and E. L. Mosier and J.C. Antweiler},
  year = {1973},
  url = {https://pubs.usgs.gov/publication/70156681},
  note = {Source identifier: 70156681}
}