Birket-Srnith, Kaj. “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 - Danish Journal of Geography 21 (January 1, 1912). Accessed December 5, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/49675.