@misc{indiciae12cc84176e16,
  title = {End-tidal gas sampler.},
  author = {J W Severinghaus and F N Hamilton},
  year = {1970},
  doi = {10.1152/jappl.1970.28.2.244},
  url = {https://pubmed.ncbi.nlm.nih.gov/5413315/},
  note = {Source identifier: 5413315}
}