@misc{indiciae4aa27eb5cdde,
  title = {Observer error in ultrasonic fetal cephalometry.},
  author = {P Bergsjoo and T Bakke and L Salamonsen},
  year = {1975},
  doi = {10.3109/00016347509158664},
  url = {https://pubmed.ncbi.nlm.nih.gov/1167725/},
  note = {Source identifier: 1167725}
}