@misc{indiciaed8d4c15c111b,
  title = {Observations of the eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington},
  author = {Richard P. Hoblitt},
  year = {1986},
  doi = {10.3133/pp1335},
  url = {https://pubs.usgs.gov/publication/pp1335},
  note = {Source identifier: pp1335}
}