共 24 条
[11]
Ludomirski A., 1996, American Journal of Obstetrics and Gynecology, V174, P328
[12]
LUDOMIRSKI A, 1996, AM J OBSTET GYNECOL, V174, P319
[15]
Nelson TR, 1996, J ULTRAS MED, V15, P1
[16]
PRETORIUS DH, 1995, J ULTRAS MED, V14, P349
[17]
PRETORIUS DH, 1994, J ULTRAS MED, V13, P871
[19]
REECE DA, 1994, FUNDAMENTALS OBSTET
[20]
REECE EA, IN PRESS LANCET