00409nam a2200157Ia 4500003000900000008004100009040001600050080001500066100001200081245004400093250001200137260003200149300001600181650004100197650001300238IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a621.3bKEE  aKeen, R 0aWireless direction findingcRoland Keen  a4th ed.  aLondonbJliffe & Sonsc1949  axii, 1059p.  aAstronomy and Astrophysics Thesaurus  aWireless