@book{40772,
	author = {Giordana, C. A.},
	title = {Ensayos de concentración de una mena de plomo-zinc de San Antonio Oeste (prov. Río Negro) :},
	publisher = {IDGYM,},
	year = {oct, 1976.},
	series = {Informe Inédito},
	address = {Jujuy :}
}