GRAPTOLITE-TRILOBITE BIOSTRATIGRAPHY IN THE SANTA VICTORIA AREA, NORTHWESTERN ARGENTINA. A KEY FOR REGIONAL AND WORLDWIDE CORRELATION OF THE LOWER ORDOVICIAN (TREMADOCIAN–FLOIAN). (2015). Ameghiniana, 52(5), 535–557. https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2905