@misc{indiciae2c9d62661dad,
  title = {National insurance certification.},
  author = {S L Smith},
  year = {1973},
  doi = {10.1136/bmj.2.5865.555-e},
  url = {https://pubmed.ncbi.nlm.nih.gov/4714501/},
  note = {Source identifier: 4714501}
}