?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Welling%2C+D.&rft.aufirst=D.&rft.aulast=Welling&rft.degree=Bachelor&rft.title=Leefbaarheid+van+het+Waddengebied%2C+door+de+ogen+van+ouderen.&rft.date=2015