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Casos notificados de enfermedades de declaracion obligatoria en las Americas, 1966
(Organización Panamericana de la Salud, 1969)
Health Conditions in the Americas 1961-1962
(Pan American Health Organization, 1964)
[From Introduction]: This report is less extensive than the previous Summaries of Four-Year Reports on Health Conditions in the Americas with respect to the health problems included. The largest chapters are concerned with ...