共 14 条
- [1] ANDERSON GG, 1972, AM J OBSTET GYNECOL, V112, P383
- [2] BARDEN TP, 1972, J REPROD MED, V9, P339
- [3] BISHOP EH, 1964, OBSTET GYNECOL, V24, P266
- [4] BURNETT JE, 1966, OBSTET GYNECOL, V28, P479
- [6] Embrey M P, 1969, J Obstet Gynaecol Br Commonw, V76, P783
- [7] FRIEDMAN EA, 1966, OBSTET GYNECOL, V28, P495
- [8] KARIM S M M, 1969, Journal of Obstetrics and Gynaecology of the British Commonwealth, V76, P769