@misc{indiciae519edd882e1c,
  title = {Map showing relative amounts of landslides in California},
  author = {Dorothy H. Radbruch and Kenneth C. Crowther},
  year = {1970},
  doi = {10.3133/ofr70270},
  url = {https://pubs.usgs.gov/publication/ofr70270},
  note = {Source identifier: ofr70270}
}