FRISTRUP., B. George H. T. Kimble & Dorothy Good: Geography of the Northlands. American Geographical Society, Special Publications. No. 32. Geografisk Tidsskrift, [S. l.], v. 55, 1956. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/46270. Acesso em: 6 maj. 2024.