@misc{indiciae55268d355d56,
  title = {[Decrease in twin births in the german federal republic (author's transl)].},
  author = {J Krüger and P Propping},
  year = {1976},
  doi = {10.1055/s-0028-1104142},
  url = {https://pubmed.ncbi.nlm.nih.gov/943284/},
  note = {Source identifier: 943284}
}