Report /
WHO Expert Committee on Smallpox.
Geneva : World Health Organization,
1964.
Reports on the 1st and 2nd sessions were published in the Official records of the World Health Organization series under the title: Reports of Expert Committees to the Interim Commission.
Smallpox.
Smallpox

Reports of Expert Committees to the Interim Commission
Report (WHO Expert Committee on Smallpox Eradication)