@misc{indiciaeaae183b4412c,
  title = {Birth positions.},
  author = {J K Gupta and R J Lilford},
  year = {1987},
  doi = {10.1016/s0266-6138(87)80058-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3649547/},
  note = {Source identifier: 3649547}
}