共 19 条
[1]
BAKKETEIG LS, 1984, LANCET, V2, P207
[2]
BANTA HD, 1979, DHEW PHS793245 PUBL
[3]
PREDICTIVE VALUE OF ULTRASOUND MEASUREMENT IN EARLY-PREGNANCY - A RANDOMIZED CONTROLLED TRIAL
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1982, 89 (05)
:338-341
[5]
BLONDEL B, 1982, REV EPIDEMIOL SANTE, V30, P21
[7]
BLONDEL B, 1985, MED PERINATALE, P301
[8]
BREART G, 1983, MED PERINATALE, P187
[10]
DEVOUASSOUX J, 1982, SANTE SECURITE SOCIA, V3, P27