@misc{indiciae38be8344fe4e,
  title = {Progress in protecting air travel from volcanic ash clouds},
  author = {Larry G. Mastin and Michael J. Pavolonis and Samantha Engwell and Rory Clarkson and Claire Witham and Greg Brock and Ian Lisk and Marianne C. Guffanti and Andrew C. Tupper and David J. Schneider and Frances Beckett and Thomas J. Casadevall and Graham Rennie},
  year = {2021},
  doi = {10.1007/s00445-021-01511-x},
  url = {https://pubs.usgs.gov/publication/70228745},
  note = {Source identifier: 70228745}
}