@misc{indiciaee0c811bcb485,
  title = {Integrated head developments.},
  author = {E P Valstyn},
  year = {1972},
  doi = {10.1111/j.1749-6632.1972.tb13124.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4500474/},
  note = {Source identifier: 4500474}
}