@misc{indiciae15777d589c00,
  title = {[Statistical data on pregnancy].},
  author = {F Oñorbe and J Ordás and J M Villar and E Alonso and J M Alberdi},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/5354202/},
  note = {Source identifier: 5354202}
}