00549nam a2200157Ia 4500003000900000008004100009040001600050080002000066100001200086245013700098260004700235300002300282650004100305700002100346700002400367IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a621.396.62bOTT  aOtte, J 0aFrom the electron to the superhetba simplified course for the radio service mancJ. Otte , Ph. F. Salverda  and C. J. Van Willigen.  aeindhovenbPhilips Technical Libraryc1954  a[various pagings.]  aAstronomy and Astrophysics Thesaurus  aSalverda, Ph. F.  aVan, Willigen C. J.