@misc{indiciaee0211ac22ba5,
  title = {Rock-fall hazard assessment of the Aspen Forest Trail, Navajo National Monument, Arizona},
  author = {Gerald F. Wieczorek and Edwin L. Harp},
  year = {2000},
  doi = {10.3133/ofr00305},
  url = {https://pubs.usgs.gov/publication/ofr00305},
  note = {Source identifier: ofr00305}
}