@book{justhis1219,
           title = {Essai sur l'emprisonnement cellulaire en France et {\`a} l'{\'e}tranger},
          author = {Joseph Astor},
         address = {Paris},
       publisher = {A. Rousseau},
            year = {1887},
        keywords = {prison	penitentiary jail	gevangenis
France Frankrijk},
             url = {http://www.just-his.be/eprints/1219/}
}