BIRKET-SRNITH, K. W. Barbrooke Grubb: An Unknown People in an Unknown Land. Ed. by H. T. Morrey Jones. Wilh 60 illustrations and a map. Seeley & Co. London 1911. 330 Sider. B°. Geografisk Tidsskrift, [S. l.], v. 21, 1912. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/49675. Acesso em: 3 maj. 2024.