00456nam a2200121Ia 4500008004100000040001700041082002600058110003200084245012300116260003300239300001000272650005200282190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta621.38403bO23E  aOdhamsPress United (London) 4aThe Encyclopaedia of radio and televisionba complete alphabetical reference to all aspects of modern radio technology  aLondonbOdhams Pressc[19-?]  a768p.  aRadio-Encyclopaedias; Television-Encyclopaedias