?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Van+Orshoven%2C+Paul&rft.aulast=Van+Orshoven&rft.aufirst=Paul&rft.date=1991&rft.btitle=Inleiding+tot+de+bronnen+en+de+beginselen+van+het+recht.+I.&rft.genre=book