@misc{indiciaee9b177e93c06,
  title = {Semiquantitative assessment of changing volcanic risk at Mount St. Helens, Washington},
  author = {C. G. Newhall},
  year = {1984},
  doi = {10.3133/ofr84272},
  url = {https://pubs.usgs.gov/publication/ofr84272},
  note = {Source identifier: ofr84272}
}