@misc{indiciaeefdeb5f45e27,
  title = {Matching in analytical studies.},
  author = {W G COCHRAN},
  year = {1953},
  doi = {10.2105/ajph.43.6\_pt\_1.684},
  url = {https://pubmed.ncbi.nlm.nih.gov/13040588/},
  note = {Source identifier: 13040588}
}