00700nam0-22002411i-450-99000400263040332120040224150723.0000400263FED01000400263(Aleph)000400263FED0100040026320040109d--------km-y0itay50------baengRadio ray propagation in the ionosphereKelso J.M.New YorkMcgraw Hill book company1964Kelso,John Morris<1922- >384114ITUNINARICAUNIMARCBK99000400263040332100 L15492783DETECDETECRadio ray propagation in the ionosphere472336UNINA