@book{35306,
	author = {Grassmann, Winfried Karl.},
	title = {Matemática discreta y logica :},
	publisher = {Prentice Hall,},
	year = {1998.},
	address = {Madrid :},
	note = {Incluye indice \Subtitulo tomado de la caratula\Titulo original. Logic and discrete mathematics.}
}