?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=de+Roo%2C+Bas&rft.aulast=de+Roo&rft.aufirst=Bas&rft.issue=3&rft.volume=12&rft.date=2015&rft.atitle=The+Trouble+with+Tariffs%3A+Custom+Policies+and+the+Shaky+Balance+between+Colonial+and+Private+Interests+in+the+Congo+(1886-1914)&rft.title=Tijdschrift+voor+Sociale+en+Economische+Geschiedenis%2F+The+Low+Countries+Journal+of+Social+and+Economic+History&rft.pages=1-22&rft.genre=article