@misc{indiciae680f71fffcdc,
  title = {General distribution of copper and lead in rocks and soils in the Coeur d'Alene district, Idaho and Montana},
  author = {G. Bayard Gott and J. B. Cathrall},
  year = {1979},
  doi = {10.3133/i1093e},
  url = {https://pubs.usgs.gov/publication/i1093E},
  note = {Source identifier: i1093E}
}