@misc{indiciae18b9fae5f704,
  title = {Obsidian hydration profile measurements using a nuclear reaction technique},
  author = {R.R. Lee and D.A. Leich and T.A. Tombrello and J.E. Ericson and I. Friedman},
  year = {1974},
  doi = {10.1038/250044a0},
  url = {https://pubs.usgs.gov/publication/70001287},
  note = {Source identifier: 70001287}
}