チャドの鉄道Transportation - The Problem's of West Africa's Land-locked States”, in Charles A Fisher, Essays in political geography, Taylor and Francis, https://books
イブン・ファキーフ・ハマダーニーthe countries of Iran, Arabia, Iraq, Syria, Egypt, Rum, Jazira, Central Asia, Nubia and Abyssinia. North Africa, al-Andalus and Sudan are given merely