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Publications by authors named "R Perez-Heredia"
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[The National Seroepidemiological Survey. I. Conceptual design and methodology].
G Gutiérrez
J Sepúlveda-Amor
R Tapia-Conyer
R Pérez-Heredia
G Solache-Alcaraz
Salud Publica Mex
April 1989
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