@misc{indiciae357609e33869,
  title = {Preparation for labor: a historical perspective.},
  author = {N C Beck and E A Geden and G T Brouder},
  year = {1979},
  doi = {10.1097/00006842-197905000-00007},
  url = {https://pubmed.ncbi.nlm.nih.gov/382225/},
  note = {Source identifier: 382225}
}