The Norwegian Aurora Polaris Expedition 1902-1903. Vol. 1 Section 1. Vol. 1 Section 1 : On the cause of magnetic storms and the origin of terrestrial magnetism by Kristian Birkeland — Oulie
The Norwegian Aurora Polaris Expedition 1902-1903. Vol. 1 Section 1. Vol. 1 Section 1 : On the cause of magnetic storms and the origin of terrestrial magnetism
