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Start Over Subjects Central America ✖ Subjects Disease Eradication -- history ✖ Subjects Poliovirus Vaccines -- history ✖

1. Erradicación del la poliomelitis en las Americas

Publication:: Produced: [Washington, DC] : Organización Panamericana de la Salud, 1985
Subject(s):: Poliomyelitis -- prevention & control
Poliomyelitis -- history
Poliovirus Vaccines -- history
Disease Eradication -- history
North America
South America
Central America