CitasFriedrich, E., Richard Andree, E. Umbreit, W. Ketterer, and G. Kirchner. "Südamerika, Nördliche Hälfte." Map. 1902. Accessed July 6, 2023. https://catalogoenlinea.bibliotecanacional.gov.co/custom/web/content/mapoteca/fmapoteca_192_fnavas_84/fmapoteca_192_fnavas_84.html#.
Friedrich, E., Richard Andree, E. Umbreit, W. Ketterer, and G. Kirchner. "Südamerika, Nördliche Hälfte." Map. 1902. Accessed July 6, 2023. https://catalogoenlinea.bibliotecanacional.gov.co/custom/web/content/mapoteca/fmapoteca_192_fnavas_84/fmapoteca_192_fnavas_84.html#.