@misc{indiciae20e31f618d70,
  title = {Conversion code from the RCGP to the ICHPPC classification system.},
  author = {R Schneeweiss and H W Stuart and J Froom and M Wood and H L Tindall and J D Williamson},
  year = {1978},
  url = {https://pubmed.ncbi.nlm.nih.gov/670911/},
  note = {Source identifier: 670911}
}