?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.date=1974&rft.btitle=Constitution+de+la+Belgique+du+7+f%C3%A9vrier+1831%2C+avec+les+modifications&rft.tpages=48&rft.genre=book