ARENAS, F. The territorial structuring of the Biobío Region: another pending challenge. Revista de Geografía Norte Grande, [S. l.], n. 19, p. 83–88, 1992. Disponível em: https://onomazein.letras.uc.cl/index.php/RGNG/article/view/40505. Acesso em: 27 sep. 2024.