共 37 条
[1]
BARKOVICH AJ, 1988, AM J NEURORADIOL, V9, P493
[2]
CAMPBELL J, 1987, OBSTET GYNECOL, V70, P247
[4]
CHERVENAK FA, 1984, LANCET, V2, P179
[6]
COMSTOCK CH, 1985, J ULTRAS MED, V4, P613
[7]
COMSTOCK CH, 1985, OBSTET GYNECOL, V66, pS25
[9]
EDWARDS J H, 1958, Br J Prev Soc Med, V12, P115