@misc{indiciae5a2333927d9f,
  title = {A new automatic nonrebreathing valve.},
  author = {T Hirano and T Saito},
  year = {1969},
  doi = {10.1097/00000542-196907000-00025},
  url = {https://pubmed.ncbi.nlm.nih.gov/5254588/},
  note = {Source identifier: 5254588}
}