共 105 条
[42]
Routine obstetric ultrasound examinations in South Africa: Cost and effect on perinatal outcome - A prospective randomised controlled trial
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1996, 103 (06)
:501-507
[43]
Goffinet F, 1997, BRIT J OBSTET GYNAEC, V104, P419
[47]
HELLMAN LM, 1970, LANCET, V1, P1133