@misc{indiciaee0a47911c915,
  title = {A piston-type nonrebreathing valve.},
  author = {G W NEWTON and W K NOWILL and C R STEPHEN},
  year = {1955},
  doi = {10.1097/00000542-195511000-00030},
  url = {https://pubmed.ncbi.nlm.nih.gov/13353813/},
  note = {Source identifier: 13353813}
}