00260nam a2200109Ia 4500008004100000041000800041082002100049100001300070245001400083260004500097300000800142211209s1950    xx            000 0 und d  aeng  a621.3824 N50 JOH  aJOHN D K  aANTENNAS   aNEW YORKbMCGRAW-HILL BOOK COMPANYc1950  a564