@misc{indiciaeebcd3a00e8f4,
  title = {Simple charcoal filter for closed circuit anesthesia.},
  author = {R K Baumgarten},
  year = {1985},
  doi = {10.1097/00000542-198507000-00033},
  url = {https://pubmed.ncbi.nlm.nih.gov/4014766/},
  note = {Source identifier: 4014766}
}