共 2 条
[1]
RISK OF ADOLESCENT PREGNANCY IN THE 1ST MONTHS OF INTERCOURSE
[J].
FAMILY PLANNING PERSPECTIVES,
1979, 11 (04)
:215-&
[2]
1ST PREGNANCIES TO WOMEN AGED 15-19 - 1976 AND 1971
[J].
FAMILY PLANNING PERSPECTIVES,
1978, 10 (01)
:11-20