@misc{indiciae30a6eaa3dbb0,
  title = {A modified Ayres T--piece.},
  author = {D W Bethune and T C Crichton},
  year = {1967},
  doi = {10.1111/j.1365-2044.1967.tb02707.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6016180/},
  note = {Source identifier: 6016180}
}