@misc{indiciae62508179ddea,
  title = {The rapids and waves of the Colorado River, Grand Canyon, Arizona},
  author = {S. W. Kieffer},
  year = {1987},
  doi = {10.3133/ofr8796},
  url = {https://pubs.usgs.gov/publication/ofr8796},
  note = {Source identifier: ofr8796}
}