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Barbosa, Victorio; Stewien, Klaus E.; Lima, Olmar S. de; Osiro, Katsumi Level of immunity to poliomyelitis in a group of children vaccinated according to the current official vaccination scheme (S. Paulo, Brazil). Revista de Saúde Pública, 1978, vol.12, n. 3, ISSN 0034-8910.

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