@misc{indiciae8a31d2c5351c,
  title = {Epidemiological research methods. Part VI. Planning a research project.},
  author = {J L Botha and D Yach},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3672276/},
  note = {Source identifier: 3672276}
}