000 00268nam a2200109Ia 4500
008 220204s9999 xx 000 0 und d
082 _a621.396
_bRAD
245 0 _aRadio valve and transistor data
260 _aLondon
_bIliffe
_c1970
650 _aRadio wave
942 _cBK
999 _c22376
_d22376