@misc{indiciae06b1b3b07d93,
  title = {A mixed expired gas sampler.},
  author = {S K Gupta},
  year = {1970},
  doi = {10.1097/00000542-197001000-00017},
  url = {https://pubmed.ncbi.nlm.nih.gov/5409593/},
  note = {Source identifier: 5409593}
}