@misc{indiciae7971cf3f277e,
  title = {The gold pan as a quantitative tool},
  author = {Paul Kellogg Theobald},
  year = {1956},
  doi = {10.3133/tei487},
  url = {https://pubs.usgs.gov/publication/tei487},
  note = {Source identifier: tei487}
}