@misc{indiciaec3f2b7ac01e1,
  title = {El Chichón's "surprise" eruption in 1982: lessons for reducing volcano risk},
  author = {R.I. Tilling},
  year = {2009},
  url = {https://pubs.usgs.gov/publication/70035886},
  note = {Source identifier: 70035886}
}