@misc{indiciaee86fb61c2299,
  title = {[Lung function with the 'Airflowmeter'].},
  author = {A van den Heever and G B Irsigler and A M Coetzee},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/897836/},
  note = {Source identifier: 897836}
}