FRISTRUP., B. Calvin J. Heusser: Late-Pleistocene Environments of North Pacific North America. American Geographical Society. Special Publication No. 35. 17,5X25 cm. XXIII+ 308 sider inclusive 25 tavler. New York 1960. 6s. Geografisk Tidsskrift, [S. l.], v. 60, 1961. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/46687. Acesso em: 3 maj. 2024.