United Nations. <br/><br/>
World population prospects 1990. 

 - New York :  U.N,  1991. 
<br/><br/> U.N Population Studies No.120. 
<br/><br/> This book provides up-to-date and internationally comparable estimates and projections of population and other major demographic variables for all countries, areas and regions of the world. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population.<br/>Population dynamics -- Population distribution//Population density/.--Population dynamics -- Population distribution//Population density/.