?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=E.+van+der&rft.au=Zaag%2C+E.+van+der&rft.aulast=Zaag&rft.date=2015&rft.degree=Bachelor&rft.title=Ontgroening+in+het+Waddengebied