@misc{indiciae4067de2ac4c3,
  title = {The variable effect of smoking on pulmonary function.},
  author = {A S Kuperman and J B Riker},
  year = {1973},
  doi = {10.1378/chest.63.5.655},
  url = {https://pubmed.ncbi.nlm.nih.gov/4703618/},
  note = {Source identifier: 4703618}
}