@misc{indiciae9c461adff46e,
  title = {Piper forceps for the aftercoming head.},
  author = {A C Barnes},
  year = {1972},
  doi = {10.1016/0002-9378(72)90757-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4673777/},
  note = {Source identifier: 4673777}
}