@misc{indiciae40d09ce7a727,
  title = {The mini-Wright expiratory peak flow meter.},
  author = {E Levin and M I Gold},
  year = {1981},
  doi = {10.1007/bf03005518},
  url = {https://pubmed.ncbi.nlm.nih.gov/6453638/},
  note = {Source identifier: 6453638}
}