Demographic indicatorsof countries  : estimates and projections as assessed in 1980 
/ United Nations, Department of international economic and social affairs 
. - New York  : United Nations, 1982
. - VIII-437 p.  ; 38 cm. 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>312.