@misc{indiciae32f812ec3390,
  title = {[Can vacuum extractor replace forceps? A 4-year survey].},
  author = {O P Grüner and O Johansen},
  year = {1967},
  url = {https://pubmed.ncbi.nlm.nih.gov/5628488/},
  note = {Source identifier: 5628488}
}