HEUPNER, S. G. LABOUR EXPLOITATION, SYSTEMATIC OPPRESSION AND VIOLENCE IN PALM OIL PLANTATIONS IN NORTH SUMATRA, INDONESIA. PEOPLE: International Journal of Social Sciences, [S. l.], v. 2, n. 1, p. 477–494, 2016. DOI: 10.20319/pijss.2016.s21.477494. Disponível em: https://grdspublishing.org/index.php/people/article/view/338. Acesso em: 27 jan. 2023.