@misc{indiciaedf8aa7752292,
  title = {Silver in the United States, exclusive of Alaska and Hawaii},
  author = {Edwin Thor McKnight and W.L. Newman and Harry Klemic and A. V. Heyl},
  year = {1962},
  doi = {10.3133/mr34},
  url = {https://pubs.usgs.gov/publication/mr34},
  note = {Source identifier: mr34}
}