@misc{indiciae6339c97e06fc,
  title = {Decrease in menarcheal age from 1966 to 1983 in Denmark.},
  author = {P Helm and S Helm},
  year = {1984},
  doi = {10.3109/00016348409155552},
  url = {https://pubmed.ncbi.nlm.nih.gov/6516812/},
  note = {Source identifier: 6516812}
}