@misc{indiciae8a02f7b15465,
  title = {Silver and bismuth-bearing galena from Leadville},
  author = {E. Chapman and R. E. Stevenson},
  year = {1933},
  doi = {10.2113/gsecongeo.28.7.678},
  url = {https://pubs.usgs.gov/publication/70221688},
  note = {Source identifier: 70221688}
}