BORRELLO, Ángel V.; GARECA, P. G. On the presence of <Nemagraptus gracilis> (Hall) in the Ordovician from the north of San Juan. Revista de la Asociación Geológica Argentina, [S. l.], v. 6, n. 3, p. 187-193, 1951. Disponível em: https://revista.geologica.org.ar/raga/article/view/962. Acesso em: 28 jan. 2023.