@misc{indiciaef13a2ae714ec,
  title = {Some observations on peak expiratory flow.},
  author = {R J SHEPHARD},
  year = {1962},
  doi = {10.1136/thx.17.1.39},
  url = {https://pubmed.ncbi.nlm.nih.gov/13911671/},
  note = {Source identifier: 13911671}
}