World population trends and policies :  1979 monitoring report. 

 - New York :  United Nations ,  1980 
 - 2 vols. :  ill. ;   28 cm.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Gov. Doc. Class. No.: </label>UN DIESA PS-70