@misc{indiciae0ee42b56d2aa,
  title = {Volcanic ash from Mount Mazama (Crater Lake) and from Glacier Peak},
  author = {H. A. Powers and R.E. Wilcox},
  year = {1964},
  doi = {10.1126/science.144.3624.1334},
  url = {https://pubs.usgs.gov/publication/70010763},
  note = {Source identifier: 70010763}
}