000 00233nam a22001097a 4500
082 _a621.384 RAD'B
100 _aBLACK, EDGAR J
_956554
245 _aRADIO VALVES
260 _aLONDON
_bPHILLIPS
_c1964
300 _a126P
942 _cBK
999 _c566945
_d566945