@book{justhis2293,
           title = {Esquisse du droit des mines en Belgique},
          author = {L{\'e}on Joly},
         address = {Bruges},
       publisher = {Ecelsior},
        keywords = {loi law wet minier mining mijnbouw},
             url = {http://www.just-his.be/eprints/2293/}
}