@misc{indiciae8c81b78babd9,
  title = {The El Chichon volcanic cloud - An introduction},
  author = {Danielsen, E. F. and Hofmann, D. J. and Rosen, J. M. and Pollack, J. B. and Toon, O. B.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19840038614},
  note = {Source identifier: 19840038614}
}