Documentary film about the "zanja de Alsina", a long trench dug in the Argentinian Pampa in 1876 as way to separate the "civilized" from the "barbarians" during the massacre of indigenous peoples known as "campaña del desierto".

• Pentafilms Cine
• Osvaldo Bayer
• Marcelo Valko
• Juan José Estévez
• Gastón Partarrieu
• Eduardo Hiriart
• Alberto Orga
• Jorgelina Walter
• Armando Nervi