@misc{indiciaeafeb5687e6b7,
  title = {[Decrease in duration of delivery from 1920 to 1965].},
  author = {A Krauss and M Wangemann},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5554832/},
  note = {Source identifier: 5554832}
}