@misc{indiciae3393e684f920,
  title = {A new mechanical ventilator for use during anesthesia.},
  author = {E W Ahlgren and C R Stephen},
  doi = {10.1097/00000542-196709000-00048},
  url = {https://pubmed.ncbi.nlm.nih.gov/5231421/},
  note = {Source identifier: 5231421}
}