@misc{indiciae77ad5116c547,
  title = {The Colorado River region and John Wesley Powell},
  author = {Mary C. Rabbitt and Edwin D. McKee and Charles B. Hunt and Luna Bergere Leopold},
  year = {1969},
  doi = {10.3133/pp669},
  url = {https://pubs.usgs.gov/publication/pp669},
  note = {Source identifier: pp669}
}