共 6 条
[1]
Alan Guttmacher Institute, 1976, 11 MILL TEEN WHAT CA
[2]
BLOCK J, 1961, QSORT METHOD PERSONA
[3]
BRACKEN MB, 1978, AM J OBSTET GYNECOL, V130, P251
[5]
BUTTS RY, 1974, J SEX RES, V10, P113
[6]
CONTRACEPTIVE PATTERNS AND PREMARITAL PREGNANCY AMONG WOMEN AGED 15-19 IN 1976
[J].
FAMILY PLANNING PERSPECTIVES,
1978, 10 (03)
:135-142