@book{40764,
	author = {Giordana, C. A.},
	title = {Ensayos de concentración de un mineral de veta de estaño de la mina Vilachay, Catamarca.},
	publisher = {IDGYM,},
	year = {jul, 1975.},
	series = {Informe Inédito},
	address = {Jujuy :}
}