@book{justhis6523,
           title = {De huishuurbesluitwet van 12 Maart 1945 (etc.)},
          author = {Robert Erkens},
         address = {Anvers},
       publisher = {De Sikkel},
            year = {1945},
             url = {http://www.just-his.be/eprints/6523/}
}