@misc{indiciae51a4204dbfde,
  title = {Upgrading anaesthetic machines.},
  author = {D B Craig and J Longmuir},
  year = {1981},
  doi = {10.1007/bf03007814},
  url = {https://pubmed.ncbi.nlm.nih.gov/7260721/},
  note = {Source identifier: 7260721}
}