@misc{indiciae1e317e4fb1ba,
  title = {Patterned variation in prehistoric chiefdoms.},
  author = {Robert D Drennan and Christian E Peterson},
  year = {2006},
  doi = {10.1073/pnas.0510862103},
  url = {https://pubmed.ncbi.nlm.nih.gov/16473941/},
  note = {Source identifier: 16473941}
}