@misc{indiciae9b39fefef8b6,
  title = {Practical pulmonary function testing.},
  author = {F G Ward},
  year = {1977},
  doi = {10.1093/occmed/27.4.138},
  url = {https://pubmed.ncbi.nlm.nih.gov/592760/},
  note = {Source identifier: 592760}
}