Gehrke, Johan. 1908. “Fridtjof Nansen: The Oceanography of the North Polar Basin. The Norwegian North Polar Expedition 1893—1896. Scientific Results Volume III No. IX. Fridtjof Nansen: On Hydrometers and the Surface Tension Of Liquids. The Norwegian North Polar Expedition 1893—1896. Scientific Results Volume III No. X”. Geografisk Tidsskrift 19 (januar). https://tidsskrift.dk/geografisktidsskrift/article/view/49391.