@misc{indiciae670a9a54e081,
  title = {Fibre-optic endoscopy.},
  author = {J D Langdon},
  year = {1981},
  doi = {10.1038/sj.bdj.4804527},
  url = {https://pubmed.ncbi.nlm.nih.gov/6936030/},
  note = {Source identifier: 6936030}
}