@misc{indiciaeb28b25562b72,
  title = {A plotting program for producing ashfall prediction maps from the output of the NOAA forecast trajectory program; application to and examples from the 1980 Mount St. Helens eruptions},
  author = {William K. Smith},
  year = {1980},
  doi = {10.3133/ofr802005},
  url = {https://pubs.usgs.gov/publication/ofr802005},
  note = {Source identifier: ofr802005}
}