@misc{indiciaee7548f33685c,
  title = {Three simple ventilators. An assessment.},
  author = {J M Collis},
  year = {1967},
  doi = {10.1111/j.1365-2044.1967.tb10157.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5233972/},
  note = {Source identifier: 5233972}
}