@misc{indiciaee5b2d36aefed,
  title = {Mapping practice population and morbidity with a computer.},
  author = {F Difford},
  year = {1985},
  doi = {10.1136/bmj.291.6501.1017},
  url = {https://pubmed.ncbi.nlm.nih.gov/3931774/},
  note = {Source identifier: 3931774}
}