Dixey, F. <br/><br/>
The East African rift valley 

 -  Her Majesty's Stationery Office  1956 
 - 71p.  ill.  26cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Africa, East
<br/><br/><label>LC Class. No.: </label>PAM QE320.D5