@misc{indiciae894c1bd3e356,
  title = {Simple apparatus to measure eustachian tube function.},
  author = {E Bortnick},
  year = {1966},
  doi = {10.1001/archotol.1966.00760020014006},
  url = {https://pubmed.ncbi.nlm.nih.gov/5900430/},
  note = {Source identifier: 5900430}
}