ESSENTIAL 291,247 Essential drugs in the new socioeconomic context of Latin America and the Caribbean t principles and strategies / [prep, by Juan Ignacio Arango et al. / ed. by Enrique Fefer, German Velasquez]. - Washington i Pan American Health Organization, 1995. - V, 13, [3] s. / 26 cm Na s. tyt. i Development and strengthening of local health systems in transformation of national health systems ISBN 92-75-12159-1