@book{40731,
	author = {Giordana, C. A.},
	title = {Estudio de concentración de una muestra de cobre de Chorrillos, mineral de veta.},
	publisher = {IDGYM,},
	year = {jul, 1969.},
	series = {Informe Inédito},
	address = {Jujuy :}
}