共 8 条
[2]
GROSS BH, 1983, J ULTRAS MED, V2, P401
[3]
Hassani N, 1974, J Natl Med Assoc, V66, P432
[5]
NOCERA RM, 1984, J ULTRAS MED, V3, P183
[6]
PERSAUD V, 1970, OBSTET GYNECOL, V35, P432
[8]
RINEHART JS, 1981, J REPROD MED, V26, P142