@misc{indiciae20869bd53329,
  title = {Improved prediction and tracking of volcanic ash clouds},
  author = {Larry G. Mastin and Peter Webley},
  year = {2009},
  doi = {10.1016/j.jvolgeores.2008.10.022},
  url = {https://pubs.usgs.gov/publication/70037304},
  note = {Source identifier: 70037304}
}