@misc{indiciae7f982ef7297b,
  title = {Iron ore on Canyon Creek, Fort Apache Indian Reservation, Arizona},
  author = {E. F. Burchard},
  year = {1931},
  doi = {10.3133/b821c},
  url = {https://pubs.usgs.gov/publication/b821C},
  note = {Source identifier: b821C}
}