@misc{indiciae133b0f711e65,
  title = {An endoscopic ruler.},
  author = {R J Toohill and B H Campbell},
  year = {1986},
  doi = {10.1177/019459988609400120},
  url = {https://pubmed.ncbi.nlm.nih.gov/3081849/},
  note = {Source identifier: 3081849}
}