Nielsen, Niels. “G. Seligman: Snow Structure and Ski Fields. 22x15 Cm, 555 S., 400 Figurer. Macmillan and Co. London 1936”. Geografisk Tidsskrift - Danish Journal of Geography, vol. 39, Jan. 1936, https://tidsskrift.dk/geografisktidsskrift/article/view/48114.