EL GENERO AMPHIGRAPTUS LAPWORTH (GRAPTOLITHINA) EN EL ORDOVICICO ARGENTINO. AMGH [Internet]. 2013 Sep. 5 [cited 2025 Dec. 14];16(1-2):1-8. Available from: https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/1576