@misc{indiciaeb84beb6c6c4d,
  title = {Map showing distribution pattern of silver from samples of the nonmagnetic fraction of heavy-mineral concentrates, northern Sonora, Mexico},
  author = {Elwin L. Mosier and Antonio Ortiz and Juan Morin and Hector Ontiveras},
  year = {1977},
  doi = {10.3133/ofr77336},
  url = {https://pubs.usgs.gov/publication/ofr77336},
  note = {Source identifier: ofr77336}
}