@book{42233,
	author = {Aceñolaza, Florencio G. and Lech, Roberto Ricardo},
	title = {Eventos del Paleozoico Inferior en Latinoamérica.},
	publisher = {Insugeo,},
	year = {1989.},
	series = {Serie Correlación Geológica},
	address = {Tucumán :}
}