Fristrup., B. (1962) “Bradford Washburn: A New Map of Mount McKinley, Alaska. The life story af a cartographic project. Reprint from The Geographical Review, Vol. LI, pp. 159—186, l kort 1:50000”., Geografisk Tidsskrift, 61. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/46766 (Set: 5 december 2025).