@misc{indiciae0ea221f1a1e3,
  title = {[Head posture in lateral roentgen image].},
  author = {U Hirschfelder and H Hirschfelder},
  year = {1991},
  doi = {10.1007/bf02166731},
  url = {https://pubmed.ncbi.nlm.nih.gov/1757021/},
  note = {Source identifier: 1757021}
}