@misc{indiciae2a3eff20ea88,
  title = {A way to classify chronic obstructive pulmonary diseases.},
  author = {I Kass},
  year = {1972},
  doi = {10.1164/arrd.1972.106.4.622},
  url = {https://pubmed.ncbi.nlm.nih.gov/5077784/},
  note = {Source identifier: 5077784}
}