@misc{indiciaec0ba2e1659dc,
  title = {Placer tin deposits in central Alaska},
  author = {Robert Mills Chapman and Robert Roy Coats and Thomas G. Payne},
  year = {1963},
  doi = {10.3133/ofr6315},
  url = {https://pubs.usgs.gov/publication/ofr6315},
  note = {Source identifier: ofr6315}
}