TY - GEN AU - World Health Organization ED - WHO Scientific Group on Developments in Fertility Control (1968 : Geneva). TI - Developments in fertility control : report of a WHO Scientific Group [meeting held in Geneva from 11 to 15 November 1968] T2 - (WHO technical report series ; 424) SN - 92-4-120424-9 PY - 1969/// CY - Geneva : PB - World Health Organization KW - Contraceptive agents ER -