Portraits of different indigenous peoples from Gran Chaco

Portraits of different indigenous peoples from Gran Chaco probably taken by Robert Lehmann-Nitsche and Carlos Bruch in Ingenio "La Esperanza", (1906). Indigenous inhabitants group photographs, landscape and hamlets of adobe dwellings views, taken during a Museo de La Plata's expedition to Argentinean Northwest, probably in the context of Boundary dispute with Chile (ca. 1902-1904).