Recent history of an Ethiopian delta the Omo River and the level of Lake Rudolf - Butzer, Karl W; Omo Research Expedition (Dept. of Geography, Chicago, Ill. University of Chicago, 1971)
'Contribution no. 25 of the Omo Research Expedition (University of Chicago Group)'
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Keywords: Physical geography -- Africa, East; Omo River, Africa -- Delta; Lake Rudolf; Africa, East -- Climate