@misc{indiciae69765517bd21,
  title = {Clinical spirometry in normal Bantu.},
  author = {Z M Johannsen and L D Erasmus},
  year = {1968},
  doi = {10.1164/arrd.1968.97.4.585},
  url = {https://pubmed.ncbi.nlm.nih.gov/4868646/},
  note = {Source identifier: 4868646}
}