@misc{indiciaecb29ebc83a1a,
  title = {Concerning the origin and occurrence of gold, platinum, and diamonds in the United States},
  author = {R.M. Patterson and Rudolph W. Knopf},
  year = {1979},
  doi = {10.3133/ofr791223},
  url = {https://pubs.usgs.gov/publication/ofr791223},
  note = {Source identifier: ofr791223}
}