共 22 条
- [1] BENACERRAF BR, 1987, J ULTRAS MED, V6, P475
- [6] BUNDY AL, 1986, J ULTRAS MED, V5, P361
- [7] CHAN L, 1989, OBSTET GYNECOL, V73, P703
- [8] CHITKARA U, 1988, OBSTET GYNECOL, V72, P185
- [9] CHUDLEIGH P, 1984, PRENATAL DIAG, V4, P135, DOI 10.1002/pd.1970040207
- [10] CLARK SL, 1988, OBSTET GYNECOL, V72, P585