@misc{indiciaeed8a940f7194,
  title = {Obsidian source identification by fission track analysis.},
  author = {S A Durrani and H A Khan and M Taj and C Renfrew},
  year = {1971},
  doi = {10.1038/233242a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/16063313/},
  note = {Source identifier: 16063313}
}