00730nam0-22002411i-450-99000400264040332120040224151253.0000400264FED01000400264(Aleph)000400264FED0100040026420040109d--------km-y0itay50------baengElectron density distribution in ionosphere and exosphereThrane E.AmsterdamNorth Holland publishing company1964Thrane,Eivind151426ITUNINARICAUNIMARCBK99000400264040332100 L15482782DETECDETECElectron density distribution in ionosphere and exosphere472337UNINA