Fristrup., B. (1958) “G. C. L. Bertram: Antarctica today and iomorrow. 14 X 22 cm. 28 s. Cambridge University Press”., Geografisk Tidsskrift - Danish Journal of Geography, 57. Available at: https://tidsskrift.dk/geografisktidsskrift/article/view/46391 (Accessed: 5 December 2025).