?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Bartelds+M.C.&rft.aulast=Bartelds+M.C.&rft.date=2013&rft.degree=Master&rft.title=DBFM+gaat+nat