@misc{indiciae25b481afa449,
  title = {Contributions to economic geology, 1922, Part I, Metals and nonmetals except fuels--Silver enrichment in the San Juan Mountains, Colorado},
  author = {E.S. Bastin},
  year = {1923},
  doi = {10.3133/b735d},
  url = {https://pubs.usgs.gov/publication/b735D},
  note = {Source identifier: b735D}
}