Mh̆lum, B. (Bernt)
Electron density profiles in the ionosphere and exosphere; proceedings of a NATO advanced institute, arr. by the Norwegian Defence Research Establishment, Skeikampen, Norway, April, 1961.
Ionosphere -- Congresses.
Norway. Forsvarets forskningsinstitutt.
NATO Science Committee
NATO Advanced Study Institute (1961 : Skeikampen, Norway)