@misc{indiciaee7a6428a00fd,
  title = {Aeromagnetic map of Tombstone and vicinity, Cochise and Santa Cruz Counties, Arizona},
  author = {Gordon E. Andreasen and C. M. Mitchell and Natalie S. Tyson},
  year = {1965},
  doi = {10.3133/ofr654},
  url = {https://pubs.usgs.gov/publication/ofr654},
  note = {Source identifier: ofr654}
}