00285nam a2200121Ia 4500100002000000250000700020654001000027245005600037260003500093082001500128300000800143546001200151  aBrindley/Ketin   a17  aradio  aNewness radio and electronics engineers pocker book  bHeinemann NewnesaLondonc1987  a1.644bBRI  a201  aENGLISH