000 00245nam a22001097a 4500
082 _a621.384 RAD'B
100 _aBALL, A. M
_978436
245 _aRADIO VALVE AND TRANSISTOR DATA
260 _aLONDON
_bIIFFE
_c1970
300 _a232P
942 _cBK
999 _c583555
_d583555