00230nam a2200097Ia 4500008004100000100001500041245002600056250000800082260003400090300000800124241003s9999    xx            000 0 und d  aHAYKIN, S. 0aCOMMUNICATION SYSTEMS  a2ND  bWILEY EASTRNaNEW DELHIc1985  a653