@misc{indiciae819f4293b40b,
  title = {Frontal sinus surgery.},
  author = {R H Lehman},
  year = {1970},
  doi = {10.3109/00016487009131770},
  url = {https://pubmed.ncbi.nlm.nih.gov/4396000/},
  note = {Source identifier: 4396000}
}