@misc{indiciae126674e95ab8,
  title = {Pulmonary function studies with simple equipment in 323 normal children.},
  author = {M T Kopetzky and R Maselli and E F Ellis},
  year = {1974},
  doi = {10.1016/0091-6749(74)90093-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4808778/},
  note = {Source identifier: 4808778}
}