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Birket-Srnith, K. 1912. 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, (Jan. 1912).