@misc{indiciae5300ee2fff77,
  title = {Volcanic ash - danger to aircraft in the north Pacific},
  author = {Christina A. Neal and Thomas J. Casadevall and Thomas P. Miller and James W. Hendley and Peter H. Stauffer},
  year = {1997},
  doi = {10.3133/fs03097},
  url = {https://pubs.usgs.gov/publication/fs03097},
  note = {Source identifier: fs03097}
}