Tappe, Oliver. “Coolie Chains: Global Commodities, Colonialism and the Question of Labour”. DIE ERDE – Journal of the Geographical Society of Berlin 147, no. 3 (October 4, 2016): 205–208. Accessed October 15, 2025. https://www.die-erde.de/index.php/die-erde/article/view/313.