@misc{indiciaed317e6294084,
  title = {Geology of the Christmas quadrangle, Gila and Pinal Counties, Arizona},
  author = {Charles Ronald Willden},
  year = {1964},
  doi = {10.3133/b1161e},
  url = {https://pubs.usgs.gov/publication/b1161E},
  note = {Source identifier: b1161E}
}