@book{40717,
	author = {Giordana, C. A.},
	title = {Ensayo de concentración de cobre de la Mina El Zorrito, prov. de Salta, 2º parte.},
	publisher = {IDGYM,},
	year = {nov, 1967.},
	series = {Informe Inédito},
	address = {Jujuy :}
}