@misc{indiciaeff2960bfda6d,
  title = {Geophysical maps of the Winchester Roadless Area, Cochise County, Arizona},
  author = {R.A. Martin},
  year = {1986},
  doi = {10.3133/mf1851},
  url = {https://pubs.usgs.gov/publication/mf1851},
  note = {Source identifier: mf1851}
}