@misc{indiciae61d45aaab251,
  title = {Landslides in the San Juan Mountains, Colorado, including a consideration of their causes and their classification},
  author = {Ernest Howe},
  year = {1909},
  doi = {10.3133/pp67},
  url = {https://pubs.usgs.gov/publication/pp67},
  note = {Source identifier: pp67}
}