CASTRO, A., and A. M. ERRAZURIZ KÖRNER. “Population and Housing Indicators for the Preparation of an Urban Atlas of the Regional Capitals of Chile”. Revista De Geografía Norte Grande, no. 19, Jan. 1992, pp. 35-45, https://analesliteraturachilena.letras.uc.cl/index.php/RGNG/article/view/39973.