BIRKET-SMITH, K. Ragnar Numelin: The Wandering Spirit. A Study of Human Migration. With a Foreword by Dr. Edward Westennarck. H. Hagerup, Copenhagen, Macmillan & Co., London. 1986.875 sider 18 x 26 cm. Pris 20 Kr. Geografisk Tidsskrift, [S. l.], v. 40, 1937. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/48143. Acesso em: 7 maj. 2024.