@book{5109,
	author = {Guzmán Herrera, Abelardo.},
	title = {Geometría y Trigonometría.},
	publisher = {Publicaciones Culturales  },
	year = {1989.},
	address = {México, D.F. },
	edition = {2a. ed.},
	note = {Incluye índice.}
}