?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Tigelaar%2C+J.&rft.aufirst=J.&rft.aulast=Tigelaar&rft.degree=Master&rft.title=Duurzaam+Handelen+bij+het+Waterschap+Hunze+en+Aa%E2%80%99s&rft.date=2005