Coba jelasin Lihat pula dari Julius Popper dong

Demam emas Tierra del Fuego

European Adventurer in Tierra del Fuego: Julio Popper, Bernard D. Ansel, Hispanic American Historical Review, Vol. 50, No. 1 (Feb., 1970), pp. 89-110

Popper, el dictador fueguino , Dr. Armando Braun Menéndez

Pictures from an album presented by Popper in 1887 to the president  Miguel Juárez Celman.

From Argentina's Glaciers to Tierra del Fuego, Cherie and Walter Glaser.