The exploration of Tibesti, Erdi, Borkou, and Ennedi in 1912-1917 — THE EXPLORATION OF TIBESTI, ERDI, BORKOU, AND ENNEDI IN 1912-1917: A Mission entrusted to the Author by the French Insti

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The exploration of Tibesti, Erdi, Borkou, and Ennedi in 1912-1917 THE EXPLORATION OF TIBESTI, ERDI, BORKOU, AND ENNEDI IN 1912-1917: A Mission entrusted to the Author by the French Insti · ch 1/13

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