000 00289nam a2200121Ia 4500
008 211209s1950 xx 000 0 und d
041 _aeng
082 _a621.3824 N50 JOH
100 _aJOHN D K
245 _aANTENNAS
260 _aNEW YORK
_bMCGRAW-HILL BOOK COMPANY
_c1950
300 _a564
999 _c20794
_d20794