TY  - GEN
ED  - WHO Division of Communicable Diseases Ad Hoc Committee on Orthopoxvirus Infections Meeting (1990 : Geneva).
TI  - Report of the Ad Hoc Committee on Orthopoxvirus Infections, Geneva, 11-13 December 1990
PY  - 1991///
CY  - Geneva : 
PB  - World Health Organization
KW  - Orthopoxvirus
ER  -