@misc{indiciae12533a6491c3,
  title = {New expiratory peak flow meter: preliminary report.},
  author = {S A Spitzer and E Neuman},
  year = {1974},
  doi = {10.1378/chest.66.4.440},
  url = {https://pubmed.ncbi.nlm.nih.gov/4414813/},
  note = {Source identifier: 4414813}
}