@misc{indiciae9891b22e8d6f,
  title = {Nonrebreathing valve competence.},
  author = {J Smith and B Conway and C F Mackenzie and J Matjasko},
  year = {1987},
  doi = {10.1097/00003246-198704000-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/3102166/},
  note = {Source identifier: 3102166}
}