@book{40775,
	author = {Giordana, C. A.},
	title = {Ensayos de concentración de un mineral de manganeso proveniente de Tuzgle, dpto. Susques.},
	publisher = {IDGYM,},
	year = {dic, 1976.},
	series = {Informe Inédito},
	address = {Jujuy :}
}