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World Health Organization ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [Country report]

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 ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [Rapport sur la variole : pays, Sierra Leone]

World Health Organization ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [Renseignements généraux : Séminaire interrégional sur l' éradication de la variole, Lagos, Nigéria, 13-20 mai 1969]

World Health Organization ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [Rapport sur la variole : pays, Ghana]

World Health Organization ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [Country report : country, Sierra Leone]

World Health Organization ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [Country report : country, Ghana]

World Health Organization ,  [Teaching exercise : field investigation of a smallpox case : syllabus for the discussion leaders]

World Health Organization ,  Inter-Regional Seminar on Smallpox Eradication (1969 : Lagos, Nigeria) ,  [General information : Inter-Regional Seminar on Smallpox Eradication, Lagos, Nigeria, 13-20 May 1969]