@book{40724,
	author = {Giordana, C. A.},
	title = {Estudio de concentración de un mineral de manganeso de la empresa Cerro Blanco de los Menucos.},
	publisher = {IDGYM,},
	year = {set, 1968.},
	series = {Informe Inédito},
	address = {Jujuy :}
}