@book{41817,
	author = {Zeballo, Fernando J. and Albanesi, Guillermo L. and Instituto Superior de Correlación Geológica},
	title = {Biostratigraphy of Ordovician sequences from Alfarcito area, Tilcara, Eastern Cordillera of Jujuy, Argentina.},
	note = {Relevamiento: 2003.}
}