@misc{indiciae4e3ac06c1829,
  title = {Reconnaissance map of the Willcox, Fisher Hills, Cochise, and Dos Cabezas quadrangles, Cochise and Graham Counties, Arizona},
  author = {J.R. Cooper},
  year = {1960},
  doi = {10.3133/mf231},
  url = {https://pubs.usgs.gov/publication/mf231},
  note = {Source identifier: mf231}
}