@misc{indiciae34ae6625ffe7,
  title = {X-ray spectrometric major-element analyses of tephra samples from the May 18, 1980 eruption of Mt. St. Helens : samples collected from Washington, Idaho, and Montana},
  author = {Joseph E. Taggart and James S. Wahlberg and Howard E. Taylor},
  year = {1980},
  doi = {10.3133/ofr801130},
  url = {https://pubs.usgs.gov/publication/ofr801130},
  note = {Source identifier: ofr801130}
}