共 6 条
[1]
CANTRELL JR, 1958, SURG GYNECOL OBSTET, V107, P602
[2]
GHIDINI A, 1988, J ULTRAS MED, V7, P567
[3]
JOYCE E, 1988, AM J MED GENET, V31, P391
[4]
NYBERG DA, 1990, DIAGNOSTIC ULTRASOUN, P395
[5]
NYBERG DA, 1990, DIAGNOSTIC ULTRASOUN, P152
[6]
ROMERO R, PRENATAL DIAGNOSIS C, P411