@misc{indiciaecccac87c9703,
  title = {A retractor for the vertical sub-sigmoid ostectomy.},
  author = {J H Robertson},
  year = {1968},
  doi = {10.1016/s0007-117x(67)80070-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5239995/},
  note = {Source identifier: 5239995}
}