@misc{indiciaed83c91120910,
  title = {Epidemiology: some unresolved problems.},
  author = {E Cumming},
  year = {1970},
  doi = {10.1176/ajp.126.11.1645},
  url = {https://pubmed.ncbi.nlm.nih.gov/5443647/},
  note = {Source identifier: 5443647}
}