@misc{indiciae2180c6fc7632,
  title = {A volcanic activity alert-level system for aviation: Review of its development and application in Alaska},
  author = {Marianne C. Guffanti and Thomas Miller},
  year = {2013},
  doi = {10.1007/s11069-013-0761-4},
  url = {https://pubs.usgs.gov/publication/70188536},
  note = {Source identifier: 70188536}
}