@misc{indiciae7e39be867065,
  title = {Geologic history of the Colorado River: Chapter C in The Colorado River region and John Wesley Powell (Professional Paper 669)},
  author = {Charles B. Hunt},
  year = {1969},
  doi = {10.3133/pp669c},
  url = {https://pubs.usgs.gov/publication/pp669C},
  note = {Source identifier: pp669C}
}