Butzer, Karl W, <br/><br/>
Recent history of an Ethiopian delta  the Omo River and the level of Lake Rudolf 
/ by Karl W. Butzer. Cartography by John A. Kirchner. 
 - Dept. of Geography, Chicago, Ill.  University of Chicago  1971. 
 - xvi, 184 pages :  illustration ;  23 cm. 
 - Research paper (University of Chicago. Dept. of Geography) ; no.136. .
<br/><br/> 'Contribution no. 25 of the Omo Research Expedition (University of Chicago Group)' 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geography--Africa, East
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Omo River, Africa--Delta<br/>Lake Rudolf<br/>Africa, East--Climate