共 10 条
[3]
KLEINMAN CS, 1994, MATERNAL FETAL MED P, P326
[5]
NYBERG DA, 1990, DIAGNOSTIC ULTRASOUN, P300
[6]
PARER JT, 1994, MATERNAL FETAL MED P, P298
[7]
REED KL, 1989, SEMIN PERINATOL, V13, P294
[9]
SILVERMAN NH, 1994, ULTRASONOGRAPHY OBST, P291