@book{justhis1959,
           title = {Wetboeken en Rechtstaal},
          author = {J.H.P. Bellefroid},
         address = {Bruges},
       publisher = {Die Keure},
            year = {1962},
        keywords = {r{\`e}glement reglement rule regulation verordening
law wet loi circulaire circular omzendbrief 
},
             url = {http://www.just-his.be/eprints/1959/}
}