@misc{indiciaeb9775c9e0d9e,
  title = {Practice time in prepared childbirth.},
  author = {R Cogan},
  doi = {10.1111/j.1552-6909.1978.tb00892.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/245440/},
  note = {Source identifier: 245440}
}