@book{justhis1614,
           title = {Les {\'e}tablissements de d{\'e}fense sociale},
          author = {A Ley},
         address = {Bruxelles},
       publisher = {Institut de Sociologie Solvay},
            year = {1952},
        keywords = {enfermement	confinement	opsluiting
"d{\'e}fense sociale"	"bescherming van de maatschappij"	"social defence" prison	penitentiary jail	gevangenis

},
             url = {http://www.just-his.be/eprints/1614/}
}