共 23 条
[1]
*A GUTTM I, US TEEN PREGN STAT
[2]
Brown SarahS., 1995, The best intentions: Unintended pregnancy and the well-being of children and families
[3]
Cohen S, 1997, JAMA-J AM MED ASSOC, V277, P1940
[5]
*CTR BUDG POL PRIO, 2000, PULL AP STAT STAT AN
[6]
*DHHS, 2001, DHHS PUBL SUBST AB M
[7]
Felice ME, 1999, PEDIATRICS, V103, P516