共 6 条
- [1] CAMILLERI AP, 1963, J OBSTET GYN BR COMM, V70, P258
- [2] EVRARD JR, 1981, OBSTET GYNECOL, V57, P581
- [3] EVRARD JR, 1982, OBSTET GYNECOL, V59, P668
- [4] GERBER JH, 1969, OBSTET GYNECOL, V33, P770
- [5] GUTTMACHER A, 1967, AM J OBSTET GYNECOL, V99, P1020