000 00259nam a22001097a 4500
082 _a621.384 POY'I
100 _aPOYSER, F. L
_940253
245 _aINTRODUCTION TO MODERN RADIO
260 _aLONDON
_bUNIVERSITY TECHNICAL
_c1949
300 _a232P
942 _cBK
999 _c584919
_d584919