@misc{indiciaeacccc7c3e45c,
  title = {Provenience of pyroclastic materials},
  author = {C. S. Ross},
  year = {1955},
  doi = {10.1130/0016-7606(1955)66[427:popm]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70206678},
  note = {Source identifier: 70206678}
}