@book{4383,
	author = {SAPAG CHAIN, NASSIR. and SAPAG CHAIN, REINALDO.},
	title = {PREPARACION Y EVALUACION DE PROYECTOS/ },
	publisher = {MCGRAW-HILL},
	year = {1995},
	address = {BOGOTA: },
	edition = {3},
	note = {INCLUYE BIBLIOGRAFIAS E INDICE.}
}