@misc{indiciaef51ae32df87c,
  title = {Economic development, population and primacy.},
  author = {H W Richardson and G Schwartz},
  year = {1988},
  doi = {10.1080/00343408812331345140},
  url = {https://pubmed.ncbi.nlm.nih.gov/12342036/},
  note = {Source identifier: 12342036}
}