@misc{indiciae25ca612cf514,
  title = {Initiation and frequency of debris flows in Grand Canyon, Arizona},
  author = {Peter G. Griffiths and Robert H. Webb and Theodore S. Melis},
  year = {1996},
  doi = {10.3133/ofr96491},
  url = {https://pubs.usgs.gov/publication/ofr96491},
  note = {Source identifier: ofr96491}
}