@book{23783,
	author = {Sommers, N. L. and Wolfson, Leandro,},
	title = {vida, libros y deberes /},
	publisher = {Centro Regional de Ayuda Técnica :},
	year = {1969.},
	address = {Buenos Aires, Argentina :},
	note = {Incluye bibliografía p. [164-167].}
}