@book{12559,
	author = {VELASCO COBA, FEDERICO, TR. and NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS, ED.},
	title = {EL SISTEMA DE LOS ENTEROS/ },
	publisher = {TRILLAS},
	year = {1970},
	series = {COLECCION TEMAS DE MATEMATICAS},
	address = {MEXICO: },
	edition = {1},
	note = {VERSION AUTORIZADA EN ESPAÑOL DELA PRIMERA EDICION PUBLICADA EN INGLES POR © 1968, THE NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS, INC. \ REIMPRESION, ENERO 1975 DE LA MISMA EDITORIAL}
}