@misc{indiciae4ac806220909,
  title = {Checking anaesthetic machines.},
  author = {H Higham and G N Beck},
  year = {1993},
  doi = {10.1111/j.1365-2044.1993.tb07086.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/8357433/},
  note = {Source identifier: 8357433}
}