Alv Egeland
1932
Carl Strmer Auroral Pioneer
Cosmical geophysics
Facts about auroras
Hva vet vi i dag om nordlyset, naturens mest praktfulle skuespill?
Kristian Birkeland
Physical signatures of magnetospheric boundary layer processes
Polar Cap Boundary Phenomena
A collection of articles on cosmic geophysics dedicated to the memory of professor L. Harang on the seventieth anniversary of his birth, 19 April 1972
An investigation of the microstructure of the perturbations in the geomagnetic field in the auroral zone
Carl Størmer's height measurement of aurora
Fading rate of auroral reflections at 92.8 Mc/s
Kr. Birkeland