Brekke, Asgeir and Alv Egeland: The Northern Lights. Their Heritage and Science. Translated by James Anderson. I salg nå! kr 400.00
[Nordlys] Vegard, L. og O. Krogness: The Position in Space of the Aurora Polaris from Observations made at the Haldde-Observatory 1913-1914. [] I salg nå! kr 1,750.00
[Nordlys] Vegard, L. og O. Krogness: The Position in Space of the Aurora Polaris from Observations made at the Haldde-Observatory 1913-1914. [] I salg nå! kr 1,750.00