FRISTRUP., B. 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, [S. l.], v. 61, 1962. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/46766. Acesso em: 18 apr. 2024.