title: [Present state of the poliomyelitis problem on the American Continent].
authors.forename: W D
authors.initials: WD
authors.lastname: HAMMOND
mesh_terms: D005006:Ethnicity; D006801:Humans; D011051:Poliomyelitis; D014481:United States
keywords: POLIOMYELITIS
vernacular_title: La situacion actual del problema de la poliomelitis en el continente americano.