TY  - BOOK
AU  -  World Health Organization 
TI  - Smallpox and its eradication
SN  - 92 4 156110 6
U1  - WC588 
PY  - 1988///
CY  - Geneva
PB  - W H O
KW  - Smallpox
N2  -  Smallpox
ER  -