@misc{indiciaef1fc8d28472f,
  title = {The airflometer--a new device for assessing changes in respiratory function.},
  author = {P Thompson and M Friedman and S Walker},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/142976/},
  note = {Source identifier: 142976}
}