@misc{indiciaeb430d29d1b77,
  title = {Letter: The Self-Employed Section.},
  author = {R C Walker},
  year = {1974},
  doi = {10.1093/ptj/54.2.177a},
  url = {https://pubmed.ncbi.nlm.nih.gov/4460023/},
  note = {Source identifier: 4460023}
}