Economie and social implications of population aging  : proceedings 
/ of the international symposium on population structure and development, Tokyo,10-12 september 1987; [organized by] united nations, department of international economic and social affairs 
. - New York  : United nations , 1988
. - VIII-430 p.  ; 28 cm. 
<br/><br/>bibliogr. 
<br/><br/><label>Source: </label> Dons divers 
<br/><br/><label>Universal Decimal Class. No.: </label>338.973.