@misc{indiciae7181de70f3d2,
  title = {Geology and ore deposits of the Dragoon quadrangle, Cochise County, Arizona},
  author = {John Roberts Cooper and Leon T. Silver},
  year = {1964},
  doi = {10.3133/pp416},
  url = {https://pubs.usgs.gov/publication/pp416},
  note = {Source identifier: pp416}
}