@misc{indiciae125d94eb2702,
  title = {Obsidian hydration dating of volcanic events},
  author = {I. Friedman and J. Obradovich},
  year = {2017},
  doi = {10.1016/0033-5894(81)90126-5},
  url = {https://pubs.usgs.gov/publication/70012031},
  note = {Source identifier: 70012031}
}