@misc{indiciaefcaa83e68bc5,
  title = {Comparative spirometry measurements using a bellows-type and a water-sealed spirometer.},
  author = {J W Ledwith},
  year = {1967},
  doi = {10.1164/arrd.1967.95.3.512},
  url = {https://pubmed.ncbi.nlm.nih.gov/6018712/},
  note = {Source identifier: 6018712}
}