共 4 条
- [1] CHANARIN I, 1967, ACTA OBST GYNEC SCAN, V46, P44
- [2] CHISHOLM M., 1966, Journal of Obstetrics and Gynaecology of the British Commonwealth, V73, P191
- [3] HANSEN H, 1967, ACTA OBST GYNEC SCAN, V46, P27
- [4] Whalley P J, 1969, Am J Obstet Gynecol, V105, P670