@misc{indiciae51bc23fbdba0,
  title = {The observational side of volcanology},
  author = {David A. Swanson and Hans-Ulrich Schmincke},
  year = {1994},
  doi = {10.1007/bf00304108},
  url = {https://pubs.usgs.gov/publication/70017067},
  note = {Source identifier: 70017067}
}