@misc{indiciae96d26e27434d,
  title = {Global data collection and the surveillance of active volcanoes},
  author = {P.L. Ward},
  year = {1990},
  doi = {10.1016/0921-8181(90)90022-5},
  url = {https://pubs.usgs.gov/publication/70016077},
  note = {Source identifier: 70016077}
}