@misc{indiciae96c354d21f4c,
  title = {A SIMPLE SCALED RULER FOR USE IN SPIROMETRY.},
  author = {P LOCKWOOD},
  year = {1963},
  doi = {10.1016/s0007-0971(63)80056-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/14069566/},
  note = {Source identifier: 14069566}
}