Trends and Recent Estimates: Contraceptive Use among U.S. Teens. Child Trends Research Brief. Publication #2006-04.Kerry Franzetta,Elizabeth Terryhumen,Jennifer Manlove,Erum IkramullahChild Trends(2006)引用 25|浏览1暂无评分关键词ethnic groups,sexualityAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要