The development of inter cultural activities at the Center for Documentation and Educational Information Pedagogical University "Rafael María de Mendive" of Pinar del Río

by José Alfonso Hernández, Nery Isabel Valdés Calvet
Published 2007-12-01

Acute respiratory illnesses in the first 18 months of life

by Ilse M. López Bravo, Haydeé Sepúlveda, Isabel Valdés
Published 1997-01-01