@misc{indiciae3693e445be86,
  title = {Letter: Ultrasonic cephalometry.},
  author = {J M Davison and T Lind and V Farr and T A Whittingham},
  year = {1973},
  doi = {10.1016/s0140-6736(73)92909-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4127677/},
  note = {Source identifier: 4127677}
}