TY - GEN ED - World Health Organization Study Group on Requirements for Smallpox Vaccine (1958 : Geneva). TI - Requirements for biological substances : 5. Requirements for smallpox vaccine : report of a study group [meeting held in Geneva from 3 to 8 November 1958] T2 - (WHO technical report series ; 180) SN - 92-4-120180-0 PY - 1959/// CY - Geneva : PB - World Health Organization KW - Smallpox vaccine KW - Standards ER -