@book{40581,
	author = {Chomnales, R.},
	title = {Estudio microscópico de minerales de cobre y plomo de mina Olga, dpto. Yavi.},
	publisher = {IDGYM,},
	year = {jun, 1970.},
	series = {Informe Inédito},
	address = {Jujuy :}
}