00515nam a2200169Ia 4500003000900000008004100009040001600050080002000066100002000086245009400106250001200200260004400212300001500256650001900271650003400290650002100324IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a621.397.62bWIT  aWitts, Alfred T 4aThe Superheterodyne receiverbIts development theory and modern practicecAlfred T. Witts  a3rd ed.  aLondonbSir Isaac Pitman and Sonsc1937  avii, 182p.  a Heterodyning  a Superheterodyne Receivers   aNASA Thesaurus