@misc{indiciae4f835d2a6a0c,
  title = {A tracheotomy speech valve.},
  author = {N G Toremalm},
  year = {1968},
  doi = {10.1288/00005537-196812000-00011},
  url = {https://pubmed.ncbi.nlm.nih.gov/5701320/},
  note = {Source identifier: 5701320}
}