Stevenson, Robert F. <br/><br/>
Population and political systems in tropical africa 
/ Robert F. Stevenson 
. - New York ;   London  : Columbia University Press, 1968
. - 306 p.  ; 24 cm. 
<br/><br/><label>Source: </label>26174  Achat 
<br/><br/><label>Universal Decimal Class. No.: </label>312.