000 00340nam a22001217a 4500
082 _a621.384 WAT'U
100 _aEBY, GEORGE S,WELCH, HERBERT E,WATSON, HERBERT M
_957295
245 _aUNDERSTANDING RADIO A GUIDE TO PRACTICAL OPERATION AND THEORY
250 _a3RD
260 _aNEWYORK
_bMCGRAW HILL
_c1960
300 _a706P
942 _cBK
999 _c567591
_d567591