00300nam a2200121Ia 4500100001700000650002700017654003400044245003400078260003100112082001500143300000800158546001200166  aSquries/T.L   aElectrical Engineering  aTelecommunication Pocket Book  aTelecommunication Pocket Book  bButtersworthaLondonc1970  a621.3bSqu  a144  aENGLISH