@misc{indiciae49c21f5cfd82,
  title = {Debris flows in Grand Canyon National Park, Arizona: magnitude, frequency and effects on the Colorado River},
  author = {Theodre S. Melis and Robert H. Webb},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70018022},
  note = {Source identifier: 70018022}
}