TY  - RPRT
TI  - Decrease in menarcheal age from 1966 to 1983 in Denmark.
AU  - P Helm
AU  - S Helm
PY  - 1984
DO  - 10.3109/00016348409155552
UR  - https://pubmed.ncbi.nlm.nih.gov/6516812/
ID  - 6516812
ER  -