@misc{indiciaec8576869034e,
  title = {Mine and prospect map of the Pusch Ridge Wilderness Area, Pima County, Arizona},
  author = {G. S. Ryan},
  year = {1982},
  doi = {10.3133/mf1356c},
  url = {https://pubs.usgs.gov/publication/mf1356C},
  note = {Source identifier: mf1356C}
}