共 104 条
- [42] GREGORY KD, 1998, OBSTET GYNECOL, P507
- [43] GROUP EM, 1993, CHANGING CHILDBIRTH
- [44] GUPTA JK, 1996, PROG OB GYN, V12, P153
- [48] HURD WW, 1983, OBSTET GYNECOL, V61, P467
- [49] IRION O, 2000, COCHRANE DATABASE SY, V2
- [50] JOHNSON P, 1993, PROGR OBSTET GYNAECO, V10, P33