@book{justhis6100,
           title = {Manuel th{\'e}orique et pratique en mati{\`e}re de soci{\'e}t{\'e}s},
          author = {P. Huybrechts},
         address = {Bruges},
       publisher = {F. Claeys},
            year = {1899},
             url = {http://www.just-his.be/eprints/6100/}
}