World health statistics annual: Annuaire de statistiques sanitaires mondiales 1981. Genéve : World Health Organization.
Chicago Style CitationWorld Health Statistics Annual: Annuaire De Statistiques Sanitaires Mondiales 1981. Genéve : World Health Organization.
MLA CitationWorld Health Statistics Annual: Annuaire De Statistiques Sanitaires Mondiales 1981. Genéve : World Health Organization.
Warning: These citations may not always be 100% accurate.