?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Zwiers%2C+J.S.&rft.aulast=Zwiers&rft.aufirst=J.S.&rft.degree=Bachelor&rft.title=De+economische+impact+van+havens+op+de+omliggende+regio+-+Een+onderzoek+in+de+Eems-+en+Emdense+haven&rft.date=2015