共 5 条
[3]
CHALLIS J, 1985, INT C S SERIES ROYAL, V922, P5
[4]
INFECTION AND PRETERM BIRTH
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1989, 96 (10)
:1128-1132
[5]
LOPEZBERNAL A, 1989, BRIT J OBSTET GYNAEC, V96, P1108