000 00257nam a2200109Ia 4500
008 160710s1961 xx 000 0 und d
100 _aGRAY AND GRAHAM
245 _aRADIO TRANSMITTERS
260 _bMCGRAW HILL BOOK
_c1961
300 _a462
942 _2ddc
_cB
999 _c25415
_d25415