East African rift system 

 - Nairob  University College  1965 
 - 115p. 
<br/><br/> Upper Mantle Committee-UNESCO Seminar. Nairobi, April 1965 
<br/><br/><label>ISBN: </label>83638 
<br/><br/><label>Dewey Class. No.: </label>910.11  / INT