000 00312nam a22001217a 4500
082 _a621.38416 WIT'S
100 _aWITTS, ALFRED T
_979938
245 _aTHE SUPERHETRODYNE RECEIVER ITS DEVELOPMENT THEORY AND MODERN PRACTICE
250 _a6TH
260 _aLONDON
_bPITMAN
_c1944
300 _a210P
942 _cBK
999 _c584916
_d584916