@book{7171,
	author = {ZILL, DENNIS G. and DEWAR, JACQUELINE M.},
	title = {ALGEBRA Y TRIGONOMETRIA/ },
	publisher = {MCGRAW-HILL},
	year = {\\\\},
	address = {SANTAFE DE BOGOTA ; MEXICO: },
	edition = {2},
	note = {INCLUYE INDICE.}
}