共 11 条
- [1] Beischer N A, 1972, Obstet Gynecol Surv, V27, P303, DOI 10.1097/00006254-197205000-00001
- [2] BOLOGNESE RJ, 1972, OBSTET GYNECOL, V39, P683
- [3] COUREY NG, 1969, OBSTET GYNECOL, V34, P523
- [5] FREEMAN RK, 1973, CONTRIB GYNECOL OBST, V1, P58
- [6] GREENE JW, 1963, AM J OBSTET GYNECOL, V85, P1