@book{40745,
	author = {Giordana, C. A.},
	title = {Estudio de concentrabilidad de un mineral de manganeso proveniente de la zona de Macón, dpto. Cochinoca.},
	publisher = {IDGYM,},
	year = {ago, 1971.},
	series = {Informe Inédito},
	address = {Jujuy :}
}