@misc{indiciae6721653630bf,
  title = {Ventilatory function tests; voluntary ventilation capacity.},
  author = {J S GRAY and D R BARNUM and H W MATHESON and S N SPIES},
  year = {1950},
  doi = {10.1172/jci102304},
  url = {https://pubmed.ncbi.nlm.nih.gov/15436658/},
  note = {Source identifier: 15436658}
}