De Roo, Bas. “The Trouble With Tariffs. Customs Policies and the Shaky Balance Between Colonial and Private Interests in the Congo (1886-1914)”. TSEG - The Low Countries Journal of Social and Economic History 12, no. 3 (September 15, 2015): 1–22. Accessed November 25, 2024. https://tseg.nl/article/view/7331.