Title: The blue Nile revealed
Subjects: Explorers, Biography, Description and travel, Natural history, Scientific expeditions, History, Discovery and exploration, Great Abbai Expedition, 1968, Great Abbai Expedition (1968), Ontdekkingsreizen, Blue nile river (ethiopia and sudan), Ethiopia, description and travel, Sudan, description and travel
Places: Blue Nile River (Ethiopia and Sudan), Ethiopia, Great Britain
Time periods: 20th century