Gazetteer Africa: Nile basin and West Africa, including Senegal, Gambia, Niger, Volta and Lake Chad basins (Ref. 2835).

• 非洲:尼罗河流域与非洲西方部，包括塞内加尔，甘比亚，尼日，佛塔河与查德湖流域.；(参考文献2835