TY  - RPRT
TI  - Age-specific secular changes in oral contraceptive use.
AU  - S Shapiro
AU  - D Slone
AU  - E R Neff
PY  - 1981
DO  - 10.1093/oxfordjournals.aje.a113226
UR  - https://pubmed.ncbi.nlm.nih.gov/7304590/
ID  - 7304590
ER  -