@misc{indiciae2a259f654914,
  title = {The geology and ore deposits of the Bisbee quadrangle, Arizona},
  author = {Frederick Leslie Ransome},
  year = {1904},
  doi = {10.3133/pp21},
  url = {https://pubs.usgs.gov/publication/pp21},
  note = {Source identifier: pp21}
}