共 8 条
[2]
Eastman NJ, 1966, WILLIAMS OBSTET, V13, P1010
[3]
ISREAL SL, 1964, OBSTET GYNECOL, V24, P411
[4]
KESSNER DM, 1973, INFANT DEATH ANALYSI
[5]
HEALTH AND SOCIAL CONSEQUENCES OF TEENAGE CHILDBEARING
[J].
FAMILY PLANNING PERSPECTIVES,
1972, 4 (03)
:45-53
[6]
1973, NCHS22 REP, P15
[7]
1971, NCHS20 REP, P8
[8]
1972, NCHS20 REP, P13