@misc{indiciae033cf1f81478,
  title = {Tracheobronchial cast.},
  author = {K P Ravikrishnan and J W Dircks},
  year = {1977},
  doi = {10.1378/chest.71.2.241},
  url = {https://pubmed.ncbi.nlm.nih.gov/832506/},
  note = {Source identifier: 832506}
}