@misc{indiciaec9de29416440,
  title = {Oxygen-air blending nomogram.},
  author = {L C Yost and W N Bernhard and C Merrill and H Turndorf},
  doi = {10.1213/00000539-197703000-00026},
  url = {https://pubmed.ncbi.nlm.nih.gov/139834/},
  note = {Source identifier: 139834}
}