@book{40492,
	author = {Bellmann, R. N.},
	title = {Estudio de la cuenca ferrífera de la Sierra Santa Bárbara, perf. 7 y 7`.},
	publisher = {IDGYM,},
	year = {1967.},
	series = {Informe Inédito},
	address = {Jujuy :}
}