?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=E.A.M.&rft.aulast=Silvius&rft.au=Silvius%2C+E.A.M.&rft.date=2016&rft.degree=Master&rft.title=Verwildering+in+Nederland