CITATION STYLE
Gadelha, C. A. G. (2020, November 1). National immunization program: The challenge of universal access in the 21st century. Ciencia e Saude Coletiva. Associacao Brasileira de Pos - Graduacao em Saude Coletiva. https://doi.org/10.1590/1413-812320202511.24562020
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