00274nam a2200097Ia 4500008004100000040003800041100001500079245002700094250000900121260004600130211228s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aMcluhan,M. 0aMedium is the massage.  aN.d.  bALLEN LANE AND PENGUIN BOOKSaU.S.Ac1967