@misc{indiciaee01fb57dba5a,
  title = {Ventilatory failure in COPD.},
  author = {M H Williams},
  year = {1973},
  doi = {10.1080/00325481.1973.11713558},
  url = {https://pubmed.ncbi.nlm.nih.gov/4727629/},
  note = {Source identifier: 4727629}
}