000 00327nam a2200121Ia 4500
100 _aFenner, F., Henderson, D. A., Arita, I. & Jezek, Z.
020 _a92 4 156110 6
942 _cBK
245 _aSmallpox and its eradication
260 _aWorld Health Organization, Geneva
_c1988
082 _a614.521 Fen
300 _axvi,1460p
999 _c59161
_d59161