00302nam a2200109Ia 4500008004100000041000800041100002100049245005000070260003600120650001500156999002100171240109s9999    xx            000 0 und d  aeng  aElton and Gruber  aModern Portfolio Theory & Investment Analysis  bJohn Wiley and Sons New  York.   aManagement  c1024769d1024769