@misc{indiciae2cd58b2a452e,
  title = {The variable functional progression of chronic obstructive lung disease.},
  author = {M C PAIN and D J READ and H J COLEBATCH and J READ},
  year = {1962},
  doi = {10.1111/imj.1962.11.3.170},
  url = {https://pubmed.ncbi.nlm.nih.gov/13941120/},
  note = {Source identifier: 13941120}
}