Willock, Colin. <br/><br/>
Africa's Rift Valley / 
by Colin Willock and the editors of Time-Life Books ; with photos. by Goetz D. Plage. 
 - Amsterdam :  Time-Life Books,  c1975. 
 - The World's wild places .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 180. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural history -- Great Rift Valley.--Natural history -- Great Rift Valley.<br/>Natural history -- Africa.--Natural history -- Africa.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Great Rift Valley.