@misc{indiciaedd52a2336717,
  title = {Suction amnioscopy for fetal blood-sampling.},
  author = {R J Beard and D A Johnson and C Bain and R H Bentall},
  year = {1970},
  doi = {10.1016/s0140-6736(70)90705-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4189583/},
  note = {Source identifier: 4189583}
}