Revista de Salud PúblicaPrint version ISSN 0124-0064
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ZAPATA-OSSA, Helmer de Jesús et al. Muestreo por conglomerados en encuestas poblacionales. Rev. salud pública [online]. 2011, vol.13, n.1, pp.141-151. ISSN 0124-0064.
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