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World Health Organization ,  [Programme national d' éradication de la variole : rapport d' enquête]

World Health Organization ,  [National smallpox eradication program : field assessment report]

World Health Organization ,  World Health Organization. Global Commission for the Certification of Smallpox Eradication ,  [Smallpox eradication in the Republic of Djibouti : status report, 13 November 1978]

Yunnan (China). Dept. of Health ,  World Health Organization ,  [Special report on smallpox and its eradication in Yunnan Province, China]

Koswara, P. A ,  World Health Organization ,  International Assessment of Smallpox Eradication in Indonesia (1974) ,  [Is routine vaccination a necessity in a smallpox eradication programme? / by P.A. Koswara]

Sultan, Gabriel ,  World Health Organization ,  [République de Guinée / médecin actuellement responsable de l' éradication de la variole, Gabriel Sultan]

Sultan, Gabriel ,  World Health Organization ,  [Republic of Guinea / medical officer at present responsible for smallpox eradication, Gabriel Sutlan]