@misc{indiciaeec9d3d91d3a7,
  title = {Landslides - Cause and effect},
  author = {D. H. Radbruch-Hall and D. J. Varnes},
  year = {1976},
  doi = {10.1007/bf02634797},
  url = {https://pubs.usgs.gov/publication/70000763},
  note = {Source identifier: 70000763}
}